Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c2f9480077bffd…

MALICIOUS

PDF

69.9 KB Created: 2020-12-18 05:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f1c249c5f3f1cef0a0911178a5d06f SHA-1: 1a368ae394ae0c33310868fe897c9518ca8dc1d9 SHA-256: 17c2f9480077bffd251e9bc72a604bd70f8a404d7a6a38f38c38afaf4d9f62c4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'trafffi.ru', suggesting a link farm or phishing attempt. ClamAV and an ML classifier have identified this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=cable+one+joplin+mo+tv+guide
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5f93b75d4627b.pdf
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5fc9d6ea89fa3.pdf
    • https://sofunidus.weebly.com/uploads/1/3/4/5/134593652/9fabbcc2c4ba2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc28bf30a2757459bed6a63/t/5fc51889bc819f1cf47af7a1/1606752394017/haynes_auto_repair_manuals.pdf
    • https://static1.squarespace.com/static/5fc10f0fab79f442f22a8155/t/5fc1356a3c6ccf69f389c0af/1606497643125/dd_5th_edition_players_handbook_color.pdf
    • https://static1.squarespace.com/static/5fc30b2524b06a7eb30d4f82/t/5fc92686117bbf7dfcb1d7ec/1607018118832/dotubojabevipizoguduxufos.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf58ee9d79364840854ace/1606375663625/laterally_supported_beam.pdf
    • https://static1.squarespace.com/static/5fc6d3bb48c1673e5598f85d/t/5fca26b34e3f3d2517445efb/1607083702855/mobile_number_tracker_free_online_philippines.pdf
    • https://s3.amazonaws.com/pazifetanegapu/zimojir.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f943485235c868cc1ca/1606291348804/17928549493.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee1500f7af3919d202c3/1606217239249/35588401776.pdf
    • https://static1.squarespace.com/static/5fc34985239b07229140aab6/t/5fcdbcf98a55f2188b96e06f/1607318779965/euro_freekick_soccer_2020_mod.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_off0000d51e.bin
1e1bdd1dcb41c0e8d21bd286d136a3c049a0e0de316433ccf0652496c8bd352f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD51E 5188 bytes
font_01_sfnt_off0000e6b8.bin
08b1c246e03b3a3b3123b263026e2e08d559a5b3a22758fb31907c8bc65caad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 10816 bytes

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