Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fffd257f57640d9…

MALICIOUS

PDF

70.9 KB Created: 2020-12-30 21:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f3b033f786c17b80e9ee947c25c0d4af SHA-1: 9c3040ee2f7da965eb6b2cc44591ae8f25c8dee7 SHA-256: 9fffd257f57640d9c7f858f2a4be15e77521ac3c87d7bffa3a527f8ad67ab36d
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 'https://gettraff.ru/123?utm_term=wolf+spider+species+arizona'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/123?utm_term=wolf+spider+species+arizona In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5f9763fd7ee29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422637/normal_5fdecd713f874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fad97ff2beaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_5fd38618d89d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5fad7a92aab88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5fca22badd467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5f8f04c8e1963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f9a3cbf01500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f8fc83d6eddf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420230/normal_5fca08d9478f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/dark_souls_2_warrior_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b7ab41-4efd-4d41-a307-f973beb3d2da/black_butler_beast_x_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/65385408128.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/25636102058.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/intermolecular_forces_worksheet_grade_11.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/browning_trail_camera_strike_force_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9af1001-de6f-4d23-b22e-5c9d8dc816b5/32941340571.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 5212 bytes
SHA-256: c0ab177a4be92d5e37df6560f63ec573f68764d5f4d88e31dbe15f0302de2b4a
font_01_sfnt_off0000ea9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9B 10532 bytes
SHA-256: 1face872ad060e282697ad97910c903513518686f89a8660fb0b843a1d60132d

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