Malicious PDF — malware analysis report

Static analysis result for SHA-256 733c4ad0488784b3…

MALICIOUS

PDF

69.0 KB Created: 2020-12-26 23:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8c7f85e800eb6b97e38dafa40b54114f SHA-1: d71364bba06b18ec692e832d94fcae5c9edef79f SHA-256: 733c4ad0488784b39cab3816cf358d4abee3c6a1b28a2f6f001248691da7f06a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm designed to distribute malicious content or phish users. ClamAV also detected it as a phishing trojan. The embedded URLs, particularly the one pointing to traffmen.ru, are highly suspicious and likely lead to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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=best+fake+nails+walmart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_5fb87dfc2b208.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/rigubu_todatatidaz_pitapukar.pdfIn PDF document text
    • https://titerafutar.weebly.com/uploads/1/3/0/7/130775646/popituvukixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5fb2c0686099f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fc5128fbd3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_5fb2bf0c1d94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5fbead1c4d7da.pdfIn PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/gobolik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fifomi/skyrim_hide_helmet_se.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/kogibevukapamaxalet.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/82372403999.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/vengeance_demon_hunter_tanking_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/jololiwuzode.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 5120 bytes
SHA-256: aae810594eb06f448f61d51df6a8339f20da0447e6301f903b2459172a338e43
font_01_sfnt_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 10676 bytes
SHA-256: 7f4fc0229227f65b19160eb4d32d76a230d4902f2bcd55a6290c1e93759410c7

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