Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1a1b97b6d74e34…

MALICIOUS

PDF

64.6 KB Created: 2020-12-20 21:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e0941c98b294243f3d2634d6773e91ce SHA-1: 9882e90a15e22d271fc2eb5008c99f88cd044faa SHA-256: cf1a1b97b6d74e3456e0f8933da1e945c794f55387008b6aecb94ead7851dd93
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=white+gogo+boots+ankle'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/strik?utm_term=white+gogo+boots+ankle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f8fd9fc4f873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5f9de8d496eac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b246eecc-67fa-4db6-9b02-a86d3d0cca7b/maltose_is_made_of_what_two_monosaccharides.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/95774686661.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/aye_dil_aye_dil_full_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d501b920-f540-486e-947e-ec703c9806c9/which_u.s._president_had_a_middle_name_that_was_just_a_single_letter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc674f71972c46e3c7d36b7/1606841594101/refalalufa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e9b17e720264005f89a/t/5fc69da0f81c9a2a0c8c8438/1606852002089/the_vikings_movie_trivia.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/53635088288.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/taiwan_visa_application_form_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f934d47-07f0-4c29-9f26-2097074ef341/tunazakafep.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/crazy_frog_2_game.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C9 5068 bytes
SHA-256: 7d31ea60ae26aa9e15a0a5952ecede88badde804957a7d8d29a917594e2aafe0
font_01_sfnt_off0000d31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 10260 bytes
SHA-256: fb1481fdf13b4d43271ae4cddf35396bd2027bf7231bff007d6f04d85a4f3cce

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