Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c6b6c140d66fd7…

MALICIOUS

PDF

67.5 KB Created: 2020-11-19 14:46:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75ab1753c3e6328e1fc8e860cfd7ecf5 SHA-1: d18eb07a40722a32455debaedc91de00295624ac SHA-256: f6c6b6c140d66fd70e5555e9113227e8c0c251852d074c78b25c2219be1de853
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also flagged it with high confidence. The embedded URL, https://traffmen.ru/123?utm_term=tipos+de+muetra, is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=tipos+de+muetra
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5f93b2e27cd70.pdf
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f94ef8e18f4c.pdf
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f9fc1724c6b3.pdf
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f8aae2e5e017.pdf
    • https://cdn-cms.f-static.net/uploads/4443595/normal_5f9c7832ce616.pdf
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f8d0014aa3ec.pdf
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5f9397db06fd5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuses/fidesupolegelipafikare.pdf
    • https://uploads.strikinglycdn.com/files/dbea48c1-6b21-45c1-aac3-e3659ab1b090/diary_of_an_oxygen_thief_first_page.pdf
    • https://uploads.strikinglycdn.com/files/8ab0a368-3d71-44ff-b924-bc78639a6578/super_smash_flash_2_beta_1.2_game.pdf
    • https://uploads.strikinglycdn.com/files/ccb6e99b-ca15-4054-b666-5c68ba81667e/61341822293.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_off0000ca88.bin
b4c7023a522353caec7b5e79f206af95561495a2816019a9644da7a671e6c818		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA88 5024 bytes
font_01_sfnt_off0000db7f.bin
47cf545407d66f1eb86f4c38d95c1db5385480d8b4202f20c55856c21e16d73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 11380 bytes

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