Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea174112f864f41…

MALICIOUS

PDF

74.7 KB Created: 2020-11-18 08:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ce16ec305a407702130edbe8b048e788 SHA-1: d34a74c04f2caa29bd86b3e8b6942f8e3d5ac708 SHA-256: 0ea174112f864f41565fc72220ac7fcae6bbbcbdfc160d3e7090af6658eea2cd
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 'https://traffmen.ru/aws?utm_term=affine+transformation+matrix+online'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

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/aws?utm_term=affine+transformation+matrix+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_5fb25a2db53c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5f9c1b8a8d43f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_5f938b7eca595.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/c5ed4114-a83e-4f89-a7f3-ca1b08304aec/mugolixixolugezolami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeee5b13-ee63-4646-8e0e-80120550c0f9/tejozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e684c700-c1b4-45b0-97d2-2cb6bd44ba6d/96339254274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746ddcfa-e83e-4ca9-9d86-966eabbba01b/67413662614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cc3285-cc0e-466a-bbcc-17670e5624ba/21059523794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7161304-9aec-42fb-ac47-ddddd39d73b7/75197737704.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/55668663897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e87fa4-f559-407a-93c1-7a60333d5ff3/affordable_uniforms_north_olmsted_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e268f3c5-a16c-4161-b4f1-50cf995a5d40/organic_chemistry_2nd_edition_klein_solutions_manual.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_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 4968 bytes
SHA-256: d0ef748cfead47722d267d8cb8e69d756f481b713bc46941a8d246f539e61639
font_01_sfnt_off0000f7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FC 11040 bytes
SHA-256: 465d398d995143d550aeb8a5e5039aad91096c28e19b42856d42f7ba61660152

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