Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad155c2a6b30d719…

MALICIOUS

PDF

60.7 KB Created: 2020-11-19 20:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8f7e57da33d98ae73c4f3845f6b0ad20 SHA-1: 9da1900ad374d72d5e909f9de19cfcbab303aae0 SHA-256: ad155c2a6b30d719dc4fdf4df884069f5cda5d1895b902f4108131ef4e9bf010
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to 'trafftec.ru'. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=suburban+sf-30f+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406473/normal_5f98df2a4b5cf.pdfIn PDF document text
    • https://nilowebun.weebly.com/uploads/1/3/4/7/134751503/ee676.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/6726825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421061/normal_5f981547ca421.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/f0271b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8fbcf216dae.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/6536571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5fa0d60b27923.pdfIn PDF document text
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/c2b8cf94e3b1e4.pdfIn PDF document text
    • https://morowuze.weebly.com/uploads/1/3/4/5/134580979/923bdb.pdfIn PDF document text
    • https://sodapovi.weebly.com/uploads/1/3/4/4/134494820/nijajasigezukixalow.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/jelumogalalow_nokukamotil_xuxixu.pdfIn PDF document text
    • https://bepewosub.weebly.com/uploads/1/3/4/4/134445398/vezukatu-bopego-suposofujed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000aeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB1 5444 bytes
SHA-256: f0f04265f25b6528f9cd17400e90089594bab292dac1ba9b97b09191bca866d8
font_01_sfnt_off0000c140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC140 11008 bytes
SHA-256: 80678f3328894af33d609d5afee7dd06f6f36727841303f067253e37ad24fcc6

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