{"id":6546,"date":"2019-03-19T14:42:58","date_gmt":"2019-03-19T15:42:58","guid":{"rendered":"https:\/\/blog.ampedsoftware.com\/?p=6546"},"modified":"2020-09-08T15:50:29","modified_gmt":"2020-09-08T13:50:29","slug":"is-your-image-is-embedded-in-a-pdf-file-no-worries-amped-authenticate-can-handle-that","status":"publish","type":"post","link":"https:\/\/blog.ampedsoftware.com\/2019\/03\/19\/is-your-image-is-embedded-in-a-pdf-file-no-worries-amped-authenticate-can-handle-that","title":{"rendered":"Is your image embedded in a PDF file? No worries, Amped Authenticate can handle that!"},"content":{"rendered":"<span class=\"rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time:<\/span> <span class=\"rt-time\">4<\/span> <span class=\"rt-label rt-postfix\">min<\/span><\/span>\n\n\n<p>Welcome to this week&#8217;s Tip Tuesday! Today we are showing you an interesting, perhaps a bit hidden, functionality of <a href=\"http:\/\/www.ampedsoftware.com\/authenticate\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">Amped Authenticate<\/a>. There is no need to introduce the PDF file format: it is surely the most widespread format for sharing digital documents. Therefore, it may easily happen that you have to deal with a PDF containing images and that some of them get questioned.<\/p>\n\n\n\n<p>What would you do in such a case (after realizing that if you drag-and-drop the PDF into Amped Authenticate, nothing happens, because it&#8217;s not an image file)? Would you take a screen capture of the picture and work with that? <em>&#8220;Nooo!&#8221;<\/em> &#8211; I hope you said! Screenshots are <em>evil <\/em>for image forensics! Ok, you would get some pixels to work with, but you would lose all metadata, you would lose encoding properties, you could be recompressing data&#8230; That means you cannot check image integrity, and finding manipulations becomes much harder. No, there&#8217;s a better way of dealing with images embedded in PDFs, and we&#8217;ll show you how! <\/p>\n\n\n\n<!--more-->\n\n\n\n<p>Let&#8217;s imagine you work for a Traffic Police Department, and you receive this PDF document from a driver who was fined (click on the link below to download the PDF)<\/p>\n\n\n\n<div class=\"wp-block-file\"><a href=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/traffic-offense-3.pdf\">Traffic Offense Complaint PDF<\/a><a href=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/traffic-offense-3.pdf\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-14.png\" alt=\"\" class=\"wp-image-6588\" width=\"566\" height=\"730\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-14.png 708w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-14-232x300.png 232w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-14-624x806.png 624w\" sizes=\"(max-width: 566px) 100vw, 566px\" \/><\/figure><\/div>\n\n\n\n<p>The tool you need is just under the <em>Tools<\/em> menu in Amped Authenticate:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-1.png\" alt=\"\" class=\"wp-image-6550\" width=\"365\" height=\"211\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-1.png 456w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-1-300x173.png 300w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><\/figure><\/div>\n\n\n\n<p>Just click on <em>Extract Embedded Images From PDF<\/em> and select the PDF file using the file browser that pops up. You will then be prompted about some options:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-2.png\" alt=\"\" class=\"wp-image-6551\" width=\"504\" height=\"224\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-2.png 579w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-2-300x133.png 300w\" sizes=\"(max-width: 504px) 100vw, 504px\" \/><\/figure><\/div>\n\n\n\n<p>In our case, the PDF is not password protected, and we have only one page, so we&#8217;ll just leave the default settings and click on the Extract button. Images will be immediately extracted in a folder located next to your evidence image.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"243\" height=\"155\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-3.png\" alt=\"\" class=\"wp-image-6552\"\/><\/figure><\/div>\n\n\n\n<p>Just open the folder and load the image showing the car into Amped Authenticate.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"665\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-4-1024x665.png\" alt=\"\" class=\"wp-image-6553\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-4-1024x665.png 1024w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-4-300x195.png 300w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-4-768x499.png 768w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-4-624x405.png 624w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-4.png 1493w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>We immediately notice that the date and time overlay (that you could see at the bottom-left in the PDF image) is not really part of the image. It was likely overlaid with a document editor, and it is stored as a different object in the PDF file. Let&#8217;s now take a look at the image using the <em>File Format<\/em> filter:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1003\" height=\"979\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-13.png\" alt=\"\" class=\"wp-image-6571\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-13.png 1003w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-13-300x293.png 300w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-13-768x750.png 768w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-13-624x609.png 624w\" sizes=\"(max-width: 1003px) 100vw, 1003px\" \/><\/figure>\n\n\n\n<p>There are traces of processing with Adobe Photoshop left in the Exif metadata! Not only, Exif dates tell us that the image was captured well before February 2019, but it was edited on February 20th, 2019!<\/p>\n\n\n\n<p>We notice there is plenty of Exif metadata: taking a look at them with the <em>EXIF<\/em> tool reveals that the image also contains GPS coordinates, that can be readily turned to a place in the world, using the <em>Show image location on Google Maps<\/em> tool (under the <em>Tool<\/em> menu). Isn&#8217;t it great that you can still find GPS information in an image stored inside a PDF?<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-8-1024x778.png\" alt=\"\" class=\"wp-image-6557\" width=\"457\" height=\"346\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-8-1024x778.png 1024w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-8-300x228.png 300w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-8-768x583.png 768w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-8-624x474.png 624w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-8.png 1464w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/><\/figure><\/div>\n\n\n\n<p>While all these inconsistencies with Exif dates and software could be enough to discard the document&#8217;s reliability, we cannot resist taking a tour in the <em>Local Analysis<\/em>. Among the others, the <em><g class=\"gr_ gr_5 gr-alert gr_spell gr_inline_cards gr_disable_anim_appear ContextualSpelling ins-del multiReplace\" id=\"5\" data-gr-id=\"5\">ADJPEG<\/g><\/em> filter gives the most enlightening response:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"756\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-9-1024x756.png\" alt=\"\" class=\"wp-image-6564\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-9-1024x756.png 1024w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-9-300x222.png 300w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-9-768x567.png 768w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-9-624x461.png 624w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-9.png 1197w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Not only was the picture likely taken at a different time than the one declared in the document: the license plate was also likely tampered with!<\/p>\n\n\n\n<p>To further stress the importance of having used the <em>Extract Embedded Images From PDF<\/em> tool, let us check what would have happened if we had taken a screenshot of the image and saved it to a JPEG file. The very same <em><g class=\"gr_ gr_4 gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling ins-del multiReplace\" id=\"4\" data-gr-id=\"4\">ADJPEG<\/g><\/em> tool, with the same parameters, would have given this output:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"859\" src=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-10-1024x859.png\" alt=\"\" class=\"wp-image-6565\" srcset=\"https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-10-1024x859.png 1024w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-10-300x252.png 300w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-10-768x644.png 768w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-10-624x523.png 624w, https:\/\/blog.ampedsoftware.com\/wp-content\/uploads\/2019\/03\/image-10.png 1054w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>There&#8217;s no need to comment: we&#8217;ve lost everything! And, of course, metadata are also gone (because when you screenshot you are creating a brand new file).<\/p>\n\n\n\n<p>Time for this week&#8217;s takeaway: always use the right tool for the right job! When you&#8217;re dealing with a PDF containing questioned images, extract them as Amped Authenticate allows you to do.<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p><span class=\"rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time:<\/span> <span class=\"rt-time\">4<\/span> <span class=\"rt-label rt-postfix\">min<\/span><\/span> Welcome to this week&#8217;s Tip Tuesday! Today we are showing you an interesting, perhaps a bit hidden, functionality of Amped Authenticate. There is no need to introduce the PDF file format: it is surely the most widespread format for sharing digital documents. Therefore, it may easily happen that you have to deal with a PDF [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":17042,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[55],"tags":[],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.1 (Yoast SEO v22.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Is your image embedded in a PDF file? No worries, Amped Authenticate can handle that! - Amped Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.ampedsoftware.com\/2019\/03\/19\/is-your-image-is-embedded-in-a-pdf-file-no-worries-amped-authenticate-can-handle-that\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Is your image embedded in a PDF file? No worries, Amped Authenticate can handle that!\" \/>\n<meta property=\"og:description\" content=\"Reading time: 4 min Welcome to this week&#8217;s Tip Tuesday! Today we are showing you an interesting, perhaps a bit hidden, functionality of Amped Authenticate. There is no need to introduce the PDF file format: it is surely the most widespread format for sharing digital documents. 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