Malicious PDF — malware analysis report

Static analysis result for SHA-256 11247734376ad9a9…

MALICIOUS

PDF

70.9 KB Created: 2020-12-25 11:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aeebae7892c3419db9a529d13ed192f0 SHA-1: 51870f8323a436f277b85aac049dbefb17cf8311 SHA-256: 11247734376ad9a933b98f45c523a71c2067bbcd2f310763282c6fb330a940bd
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains embedded links that redirect to a known malicious domain, traffmen.ru. The heuristic firings indicate that these links are used for phishing and potentially distributing malware. The ClamAV detection further confirms its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to a compromised site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4324

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=loopy%20case%20tempered%20glass%20review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_5fd78893c3fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fd15b2ebf1b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388060/normal_5fe23dcfeaa30.pdfIn PDF document text
    • https://cdn.sqhk.co/zofukumane/hgghjhg/facebook_business_manager_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_5fb2ec1f90bec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455681/normal_5fe5601cdcb30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_5fa987fa99a02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f944c1511a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fd68a6c4aaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5fd648bab70a1.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/zm6Mkjj/mabodex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5fad29f20bddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5fd27ee1ade87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/55afd81d-a2f3-4912-9107-edc235261c65/1791534895.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA6 5268 bytes
SHA-256: 846f37ce93ecb5b1e908543b8a06cf7ea49b2fdad5cb2b22034c4d8537f304a4
font_01_sfnt_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 12384 bytes
SHA-256: 11648f0635d86152be4e44b1d6bcf54e89976b3fa2bd0e664c9fc7298aaad2bd
font_02_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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