Malicious PDF — malware analysis report

Static analysis result for SHA-256 10014f5d0cb3b0c5…

MALICIOUS

PDF

68.7 KB Created: 2020-12-01 09:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be38267e8018a1a148ea5b6017d4d35a SHA-1: 4b13ea8b10d299e8d14ae9d39252b4e3dc699811 SHA-256: 10014f5d0cb3b0c5a0642317175df27e5b8f46585ef2d7d61eae72993d403ea1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, one of which points to a suspicious domain (traffine.ru), suggests a phishing or SEO spam campaign. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document activity.

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://traffine.ru/aws?utm_term=geometry+worksheets+grade+2+pdf
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5fc5acf0c99ba.pdf
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/a8de51f4.pdf
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f910ee00f327.pdf
    • https://cdn-cms.f-static.net/uploads/4485318/normal_5fafe2a87725b.pdf
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5fa5ebbff36d4.pdf
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5fa96f507082d.pdf
    • https://niresofitize.weebly.com/uploads/1/3/4/5/134576450/50946b4.pdf
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5fc086c62db0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc170e692c50b1a1e7b565d/t/5fc5d68ccb3e0f57711a4a7a/1606801039740/harry_potter_book_4_weebly.pdf
    • https://uploads.strikinglycdn.com/files/a47e7ee4-7c12-4b56-a050-81eaf5350604/61732237626.pdf
    • https://uploads.strikinglycdn.com/files/54300e73-6e93-47d9-815d-bea93a0e3bba/saint_denis_vampire.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe081a4e98326c02d71412/1606289445646/free_fishing_pier_near_me.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_off0000cf0d.bin
7d10e129b7d34fa2bdebb1f8eaf4d4b5591e2666fd8015145fef53c0ba83006f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0D 5844 bytes
font_01_sfnt_off0000e2ee.bin
497de2e1c3edc585924445c45682dd455ea4b494cf770d028e0e2b2e90d80013
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 10164 bytes