Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd49f1a1555c77a7…

MALICIOUS

PDF

71.8 KB Created: 2020-12-22 19:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: df07b3464f3f92f264f1b63892d5a041 SHA-1: 17c0e8d1f5a2986ab84b78fab375c2ac008b5698 SHA-256: fd49f1a1555c77a7a681100a3bafdb1f671ebaf1998a9bf8e0038750d914d10f
154 Risk Score

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 'traffmen.ru', which is associated with phishing and malware distribution. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests the PDF's primary function is to lure the user to a malicious external resource, likely for credential harvesting or further malware delivery.

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/123?utm_term=st+clair+county+il+delinquent+property+taxes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5f9284f7b6ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f97cbfc4ebfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_5fabdf904cc2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_5fdc8c594c92c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8736e1b8015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377642/normal_5fcc93119bbfe.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/d32a1640-d62c-40f7-b80f-e60dceb1f863/46735671955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a5e497-a995-4e58-b748-aa97518a7417/78287351993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65515de4-ecaf-4367-9ccc-c88ef7332d19/54581092761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3698e9f-a2e9-48a3-8e36-ec55590df34d/5619431948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fe44a5-749d-4a4b-8be1-5346b152ca80/67077122327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbfa88b-a30c-42e9-b8b9-fc4e5d13b2d1/51548605871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8286c163-3fee-4420-b22a-6ac6851a2401/best_string_trimmer_line_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b446d7-9e15-4aa6-80e2-8b7400882001/download_game_air_combat_fighters_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9a2da4-65da-4f9e-8510-f60b86e4ea57/12285823726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ba93fb-6a02-44ae-8919-898c6fb36c1e/17655590206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b4d6fb-034c-471e-9cd8-19bf4293453e/sitenumenamidaxe.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_off0000db24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB24 5468 bytes
SHA-256: 88db918dce70174ee35aaa1fe66064f7fd5b6a0ccf7f94bc9caefc9a276893d2
font_01_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 10444 bytes
SHA-256: 816f0548bf196a0818e46594bbea75229578c1110c396df126d7461a51a9bbff

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