Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad85fa5038b0f73…

MALICIOUS

PDF

69.0 KB Created: 2020-11-13 15:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 676c4ed53b2533980c9ece61b648c24f SHA-1: 906036a30bcba7cad111b0d4bed45b3d2cb7d679 SHA-256: 9ad85fa5038b0f73c86195bd7d43f26ae0096bd850489b99aef2ed8169fab31e
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'comics template photoshop'. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a malicious intent to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafffi.ru/aws?utm_term=comics+template+photoshop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418558/normal_5fa27769c2ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f95e5200aca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427795/normal_5f9be48f91fdf.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/5797cbbc-402e-423f-b8f8-56b9d6c62514/did_you_forget_to_inherit_a_required.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/15293432827.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/sample_persuasive_paragraph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67435dd2-9cfb-44ef-8bc9-6d22c4eef65f/xumirumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b388be-b936-45c4-a1ec-a9c6bac4f7f1/48754782322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0734f5-fca2-457f-87b8-b0d61c72ed26/ranosi.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/mebef.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/56368222209.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_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 4984 bytes
SHA-256: f8740c294a531fe5bf3e52213db0df34e57750788dee4f98cba94b221ac1cc9f
font_01_sfnt_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 10900 bytes
SHA-256: c7ad672783b5e482e992232434c20c6430645a2d4bf2045101b17c173dfa5bd1