Malicious PDF — malware analysis report

Static analysis result for SHA-256 337720ecc952f3a5…

MALICIOUS

PDF

65.7 KB Created: 2020-12-23 17:31:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 92d54e5417a21b7ea0f6975e945e2c78 SHA-1: 1b299005307a49cc9ca29c99b89e11964866c8df SHA-256: 337720ecc952f3a5d5bab1bc2ff3c40409f38e241989928a17b479df42223fe3
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The embedded URL points to 'traffine.ru', which is identified as a malicious redirector. No scripts were extracted, but the presence of malicious links suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://traffine.ru/123?utm_term=teton+explorer+4000+hydration In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5fa306e4d4062.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/gBgihbN/10003033605.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/7f005.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/c71e970.pdfIn PDF document text
    • https://cdn.sqhk.co/kapudome/RANPdkq/11286826906.pdfIn PDF document text
    • https://siropenisawad.weebly.com/uploads/1/3/4/3/134353493/6277846.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370543/normal_5fce8f79f405b.pdfIn PDF document text
    • https://cdn.sqhk.co/lutaxudepoje/gdjjrpC/depizerem.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/d255dd84-09db-4edd-992f-9af585a25767/thorme_de_superposition_exercice_c.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/kivefomutejulosufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659e9c75-c856-4b81-a8b3-6b954770105c/58783914832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d076e25-8db5-4660-8bfc-a2c04b2c75b4/xivoboxi.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 5220 bytes
SHA-256: e09247462d4c3fccba33ebf8d34a312cdfdf9dd126fb572a307147115dd033ab
font_01_sfnt_off0000d9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BE 9560 bytes
SHA-256: 62bfd0dd0f264bd2cad7d2a2c8f4de2c717c74b8eb48e2e5aeffc62aa6f9214e

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