Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab86a8f51b2981f…

MALICIOUS

PDF

76.9 KB Created: 2020-12-14 16:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 264df5804d65af7f65cfd2c5c4725744 SHA-1: 74364bed4157ead2bd5a8a09e771fd8c2c5740c6 SHA-256: 3ab86a8f51b2981f84a3883e2706425659d8c2ff53c5145e21cc88a7f8f5ff05
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the ClamAV detection suggest a phishing or malware distribution attempt.

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://ggtraff.ru/aws?utm_term=fiba+official+basketball+rules+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5fa185fee0e05.pdfIn PDF document text
    • https://lakafoxure.weebly.com/uploads/1/3/4/2/134266374/risagiv.pdfIn PDF document text
    • https://fapezadedafax.weebly.com/uploads/1/3/4/6/134609176/3085385.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/53496eafb4ae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fb90e55a15fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_5fbc11a027fc8.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/mivokozibu/mgsv_first_aid_manual_location.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/identifying_theme_2_answers_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d6f9ff13940aa24c3a4c/t/5fc66686e6d49a06bb6e88cf/1606837895352/dragon_warrior_monsters.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ea416f6d44b07bfaa09/t/5fc4ddfeeaf37e3b6435520a/1606737406694/49714741471.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79cbd418d7934ac780470/t/5fd66c5dab1a676c728fd47d/1607887966375/english_grammar_exercises_questions_and_answers.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_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 5308 bytes
SHA-256: ce9636df4444c218bd1bb3b0ac1dfb2124a3ded3e70a4961f172e042834bdc6e
font_01_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 11556 bytes
SHA-256: 4337c025a7c678a1f277547b4d4ea4aeec683f696da2f1f6f176da0301c3c557

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