Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e40f7c3698cf85…

MALICIOUS

PDF

68.1 KB Created: 2020-12-09 20:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fbdd2171bb7754bebd6eed0f3e66dd81 SHA-1: 1be7390cf3a5343de3c59c21967fe59d1647a655 SHA-256: 71e40f7c3698cf85393aa38b0a78845b6438006ab4efc25e176bc6bf4b944696
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://traffine.ru/123?utm_term=time+traveler%2527s+wife+pdf'. This indicates the document's primary purpose is to lure users to a potentially malicious website. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise.

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://traffine.ru/123?utm_term=time+traveler%2527s+wife+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f9163ad8ca0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478131/normal_5fbc008d5e427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5f9bb6990c164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f92f91f205b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5fc8bf7b53462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5fadd8a807666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5fa5faf99d235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5fa4ec2b9506b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366011/normal_5fc8fa41660c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8c9b53e7a1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/xivix.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/64370765539.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/bissell_proheat_2x_manual_9200.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_off0000ccb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB9 5320 bytes
SHA-256: 1076da7e44413b31992245867025da9ee3faf12ea3652f787792bd200aa1bf50
font_01_sfnt_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 10440 bytes
SHA-256: 30dfc1a4635cf289dad6af980407b47e6a93394fa4c90cff3b13ac4ec5952e6d

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