Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e30552d500dc82…

MALICIOUS

PDF

78.8 KB Created: 2020-12-25 12:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ee333e12bf37cb1a7b63f5d9608da1d SHA-1: d1e5ad101569e26a562a9e5c87d2c1e0c28fb72d SHA-256: 00e30552d500dc82944d1a8a980d7538eb23a66a5caaef0937827e5b9e4c3300
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, https://cctraff.ru/strik?utm_term=mountain+bike+shoes+for+wide+feet, which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=mountain+bike+shoes+for+wide+feet
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5fdd38667561f.pdf
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5fc2038ad9259.pdf
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f90897d92219.pdf
    • https://cdn.sqhk.co/marixefe/gfjc3jc/tiziretesuzo.pdf
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fe5543ad71d4.pdf
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f98e7d0b02c8.pdf
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5fca93ee1bd00.pdf
    • https://cdn.sqhk.co/retirijozi/ggWHuM6/auto_reply_message_examples.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vutame/98764231700.pdf
    • https://uploads.strikinglycdn.com/files/ed94e93f-cd25-4d4b-ad50-e7281e2a0532/tadarukavojisojok.pdf
    • https://uploads.strikinglycdn.com/files/13610090-0326-4292-a9ce-fa760df27d0d/94401091268.pdf
    • https://uploads.strikinglycdn.com/files/c374e8b9-2014-4a42-b467-9ca0f141af84/mass_effect_andromeda_mission_order.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_off0000f9a3.bin
b42d30ddffd09e5920d45c07f4bd7ecbb72d5054fcc1588d833ad368afbfbb5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 5264 bytes
font_01_sfnt_off00010ba1.bin
8fbeaeaa178a28ace714c1f93799c46a275dd405b7b00a22d4f87e8bb02e0d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA1 10192 bytes

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