Malicious PDF — malware analysis report

Static analysis result for SHA-256 d762215f61cb65e0…

MALICIOUS

PDF

63.0 KB Created: 2020-11-25 19:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77915c5d96a543f803507d946c9db30f SHA-1: 5c59a5cff2e00aa8d38bf0bbf877181bd91d1d49 SHA-256: d762215f61cb65e004d5d4b947adc5c419f8facd9f44e30bd3c0d8024dfcfaab
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 and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure at 'traffmen.ru'. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or content-luring tactic. The presence of multiple links on disposable hosting further supports this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=what+does+huh+mean+in+spanish
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/polemawab_tuzovow.pdf
    • https://robiduvasolowa.weebly.com/uploads/1/3/4/6/134657162/kudazonemeniguge.pdf
    • https://gidepezugubuwo.weebly.com/uploads/1/3/4/7/134766768/gofogoverifez.pdf
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/jiwozanonidisel_vagepipu_baxino.pdf
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/572024.pdf
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/pugax.pdf
    • https://duxevuwelinabim.weebly.com/uploads/1/3/4/3/134353564/zikamodowemuxup.pdf
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fbe19f2e7484.pdf
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fa37490e3092.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefukirexuwekij/el_paso_shooting_news_report.pdf
    • https://s3.amazonaws.com/tofizo/gopazesuvape.pdf
    • https://s3.amazonaws.com/padadutiseni/19644935307.pdf
    • https://uploads.strikinglycdn.com/files/9ce2db80-2e43-4e39-a967-569f872ce268/seredumajitazifojav.pdf
    • https://s3.amazonaws.com/mipeboro/patab.pdf
    • https://s3.amazonaws.com/lotibabakuj/88845042126.pdf
    • https://s3.amazonaws.com/jifesu/formation_of_the_new_testament_canon.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c10e.bin
6672fc3daeeace32bf6885fe7e98f15cdad7434b5d04bcab8e76ff7a29be9223		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC10E 5084 bytes
font_01_sfnt_off0000d241.bin
055a248ade208f4b7d669c3bdeddba130456e0a824ec46a122df37832fbb76a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD241 11668 bytes

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