Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0a694cc791dbb8…

MALICIOUS

PDF

69.1 KB Created: 2020-11-24 18:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 165e4bddaa7e9a133d420224d4955bdb SHA-1: 5cd75b440d48bfa2a88a68800543aace58d9d8e7 SHA-256: ad0a694cc791dbb82460e7f2563872d0aa21cd93d6ae5a1fa453134477515fa9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, with one pointing to 'traffnew.ru', suggesting a link farm or redirection scheme. The PDF's content appears to be obfuscated or corrupted, but the presence of numerous external links and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate an attempt to direct users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=jerry+petitgoue+transition+offense+part+3+lyrics
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/8582552.pdf
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fa873dae5da6.pdf
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5f924a753d846.pdf
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f9d60b24cdad.pdf
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fb2dfb8e105d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ad2c5148-1da4-4eb3-bf3a-c1a125a5c2a0/61755834870.pdf
    • https://uploads.strikinglycdn.com/files/2a4245f4-d90d-420c-9aa3-dad660d1cf7e/19094437925.pdf
    • https://uploads.strikinglycdn.com/files/a83a58cc-436a-4c87-b95e-c9c95582b51b/93302438523.pdf
    • https://uploads.strikinglycdn.com/files/ef39f008-b97b-4eba-b7a5-a334f9aa2bf5/xixafetizutukasulidepe.pdf
    • https://uploads.strikinglycdn.com/files/d913993d-9722-4498-9405-b7fbf36f144b/68145894480.pdf
    • https://uploads.strikinglycdn.com/files/b004476b-0ae4-492a-9a4d-efe542a9ca68/41884254794.pdf
    • https://uploads.strikinglycdn.com/files/278b81d3-9623-463c-8eb5-10e90f53a079/armor_keywords_fallout_4.pdf
    • https://uploads.strikinglycdn.com/files/5269282a-68d2-443c-8d6d-a6f1833922f3/96530832864.pdf
    • https://uploads.strikinglycdn.com/files/7fe7fd15-8bdf-49a1-87df-f5e9597e49aa/90525773904.pdf
    • https://uploads.strikinglycdn.com/files/474c3978-dadc-497c-96a2-5079f22b85dd/jigepula.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfff.bin
7df1d9e153b5a905e8eb3d4b16e60d0f77f4057434df0dc867b975662d49c243		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFF 5440 bytes
font_01_sfnt_off0000e29f.bin
818f6dddc8622a4c60449f669a5f617b0dc3fa629c487f4e16f4ae6a793828ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 10696 bytes

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