Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a71e890dfbeee50…

MALICIOUS

PDF

106.8 KB Created: 2020-12-06 06:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e386e16f9ace8ef06561f0cd185ef140 SHA-1: d413dd97ca5f3dfeee2bf12ab8681fb6c4301930 SHA-256: 0a71e890dfbeee50ed988ac533300a39c991de1b3bd7c818af2bc9dd8ce4c6d6
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', which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=super+bowl+prop+bets+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4450638/normal_5fb5a994b7f03.pdf
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fcc4438efc6d.pdf
    • https://cdn-cms.f-static.net/uploads/4501486/normal_5fb55d8747aed.pdf
    • https://cdn-cms.f-static.net/uploads/4477162/normal_5fb86df7e97be.pdf
    • https://cdn-cms.f-static.net/uploads/4389792/normal_5fb25d7f278bc.pdf
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fad3b29ee374.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/960d5fa7-a97a-4f84-ab57-aa7926ea639d/soleranifuriroxej.pdf
    • https://uploads.strikinglycdn.com/files/d3f721de-85dc-42a7-a5cb-3882d64e6f6d/rikuloxugutot.pdf
    • https://uploads.strikinglycdn.com/files/a40480d9-6242-446b-b167-c7bbca92c6d7/53409247003.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf66b2f8cdb769c6db0904/1606379187704/16364784104.pdf
    • https://s3.amazonaws.com/jaburirarov/6357731645.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_off0001652e.bin
ea1778946ce07c77b37c4a0ed2c5da2b1423a4064268c3e19f95546b5a22014b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1652E 5436 bytes
font_01_sfnt_off000177c7.bin
4e71ecb86e340ee0c14a263ca9993a60d07f6a2615c3ad04cd8b072325c9cdf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177C7 12020 bytes

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