Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3372daffacbd61d…

MALICIOUS

PDF

85.3 KB Created: 2020-12-18 04:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ecee07719bb5da4a6434d5d5b16b1d4d SHA-1: f7a68952ea7b92f40da287bc16683ce2935c76af SHA-256: b3372daffacbd61d450abf237857943e2efff78dadaaaa560ad731c8ab263e09
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://trafftec.ru/123?utm_term=cisco+2+chapter+8+exam+answers', is presented as exam answers, a common lure for phishing or malware. The ML classifier and ClamAV detections strongly indicate malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=cisco+2+chapter+8+exam+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f95f4a42846d.pdfIn PDF document text
    • https://vojelapavefiga.weebly.com/uploads/1/3/4/3/134308780/xagagubazilas_tomutig_kudabifal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fc5443b38b8f.pdfIn PDF document text
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/b631e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f8b781974937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_5fa08b994014c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5a0febd14ff0dd2bcca88/t/5fc7af1e4f9413233b2a06c2/1606922014925/81615155663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72e3b20-507f-4ef4-a734-c775ce6c5c17/2940369897.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68a6da8793968642f1420/t/5fd6eabe491a58544a256ec3/1607920319043/john_lewis_childrens_shoes_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa149004-122e-4fd0-aacf-ecc4c61046dd/65928439008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309bea86-6360-4d9b-843d-fff21b87625c/xutagodorox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3eb314c-9dd9-4829-b070-ea01ef8d079e/29754548210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b84cd8-cb9a-4c9e-a4b3-6ce3b01ff4b6/sifumolovobigijava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df203b6-4a6c-4943-83ea-7804ae221e0f/21455450800.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1bcddd26ff1194f799cbf/t/5fc432675147b14804b7ca82/1606693480823/watching_the_orator_at_work_translation.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_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 5532 bytes
SHA-256: 1283edfc46719c7df4f5ca10aed32acdfd785d00b67d7a39eb75520035c15d92
font_01_sfnt_off000122d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D9 11084 bytes
SHA-256: 47eacb07d2e80fe03a80a60bd096193d9d13a33884e29165989d343105a05180

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