Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac06546fa21ef1ab…

MALICIOUS

PDF

74.4 KB Created: 2020-12-16 16:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f221c5e5e90796c5c366041ea2929d47 SHA-1: 68370f20a9e2d3bfa27843a26996e6796e5682c6 SHA-256: ac06546fa21ef1ab15559102353f20cdad7bed9be4729d7f52a0175ab3d1899f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffmen.ru/strik?utm_term=zetaclear+reviews+complaints
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fca7c8c01e76.pdf
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5fc834a15662f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc108783c6ccf69f3825875/1606486157005/xoluvesotuketuta.pdf
    • https://static1.squarespace.com/static/5fc13908affbf90a66ec9ac0/t/5fc6386de18c5c478eceb375/1606826096662/ships_simulator_games_download.pdf
    • https://s3.amazonaws.com/feborobegibew/18484523275.pdf
    • https://s3.amazonaws.com/dazinibonofobi/3877779691.pdf
    • https://static1.squarespace.com/static/5fc654757848ba205d3de070/t/5fcf54fc556296156150223e/1607423228644/tajijigisemitomikuvoxato.pdf
    • https://s3.amazonaws.com/vukujidor/46255917924.pdf
    • https://s3.amazonaws.com/juduk/font_free_acuchillada.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_off0000e535.bin
03ee5b5403299f3468de6da7781938f68895c7385c83553c8eeedc5f674377a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 5188 bytes
font_01_sfnt_off0000f6db.bin
3bbf4ef88b69896efd3194de81bf18f6cb5d775b5bd7e8fc6deac7f87b3a8448		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 11288 bytes

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