Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84754cb4306ff94…

MALICIOUS

PDF

129.0 KB Created: 2020-12-28 18:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbad18c4c6db1c75d8a4f8ceade1136a SHA-1: deadd16ea8ebd25da71c7b66f7fe89eabf2b3cd3 SHA-256: f84754cb4306ff9488097606fce3fdd885cc553ddcfc07c0dca30f3f23315b37
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'traffmen.ru', indicating a malicious redirector. The 'PDF_SEO_LINK_FARM' heuristic further supports this by identifying a mass of external PDF links, suggesting an attempt to manipulate search results or lure users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/strik?utm_term=darkestville+castle+ps4
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f8e02711bf19.pdf
    • https://gelatotagubas.weebly.com/uploads/1/3/0/8/130813077/latorapugop-virelo.pdf
    • https://cdn.sqhk.co/vuxesojogugu/aUjfVgj/vanessa_feltz_word_of_the_day_today.pdf
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5fc0765384ae6.pdf
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5fbfb951e6a0c.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/bazarerin-surilugajexu-jusibut-jopaxig.pdf
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcf2f35c68d5.pdf
    • https://cdn-cms.f-static.net/uploads/4449187/normal_5f9f5f8692f0a.pdf
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5f9036a56a493.pdf
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5fd9de91bffdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/didowugorokirug/udemy_app_not_ing_course.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_off0001be37.bin
df17b8c8b8cd09ac9e3403cd058faa99e845dff1839c189fed3f7dc07b19ec0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE37 5136 bytes
font_01_sfnt_off0001cfdb.bin
46d9230605a4fa8f632011444521b165151332029bb9f6122afff71414d56712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFDB 11532 bytes

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