Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31beb30294fa7c7…

MALICIOUS

PDF

70.3 KB Created: 2020-11-25 14:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6fa731e98060bbff9fb37b227cf96d42 SHA-1: 54a6341f2606365266c92de23cfc7a12f6c8e3ac SHA-256: c31beb30294fa7c791db94ce31ff5b9d0718414a38ffec92763bf5b6284de3d9
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or redirector services, indicating a link farm designed to lead users to malicious content. The presence of a link to 'ggtraff.ru' with a 'utm_term' parameter suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=ign+hollow+knight+guide In PDF document text
    • https://bepupigo.weebly.com/uploads/1/3/4/3/134317889/7271870.pdfIn PDF document text
    • https://towimoni.weebly.com/uploads/1/3/4/3/134340956/4674733.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/dopuziwufuxizuguro.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/voninajekagefumazis.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/8ff96ad5ef5409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_5fb25a5d2ccd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d6cac05a-20b3-4705-8f4c-4c90dd438d8a/how_to_bypass_online_surveys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441272a8-19ca-46aa-8e22-46edb57f0dee/37347540043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69e6b6f-f03e-46b6-af5e-4def27a23add/virtual_girl_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b878f6-0017-4c7f-9b39-12516e4b2273/mefewifunajevidibelasuvoj.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/ziwuvames.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb29b31-3cee-429d-a710-d01dd680dd99/33056968004.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD1 4576 bytes
SHA-256: 1c9929691656182151e86bb44236270f6dbccb8ce5f3a8fdacd4b378b8979466
font_01_sfnt_off0000dc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 10096 bytes
SHA-256: e759b2ecb5011c049ea13149724c8377704748c1336cf1b51f4f1c8cf276ff7c
font_02_sfnt_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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