Malicious PDF — malware analysis report

Static analysis result for SHA-256 b263219aa02078db…

MALICIOUS

PDF

70.8 KB Created: 2021-01-06 02:30:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3ef412f59b7d249ca2328cd701a643a8 SHA-1: 25069bbec1b211335050880ce96ea1586fcc49a5 SHA-256: b263219aa02078dbfce2644d4d537e4d0cae36100b02f0f6a45809b36ec11fe0
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 'traffine.ru'. The ML classifier also strongly indicated maliciousness. 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 0.9997

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://traffine.ru/123?utm_term=jersey+auction+live In PDF document text
    • https://static.s123-cdn-static.com/uploads/4427293/normal_5fcf933fe408e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5fd2f86ae556d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5fa0a6b94e8c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_5fe9d39d2dc4d.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/julexekubaj/xevagunivebo.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/american_heart_association_cpr_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe04d035-671a-447a-a64a-ed87842f2525/relate_multiplication_to_division_lesson_1.8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77dae1ab-5014-43b0-81e6-6d5226641304/tajimijiwozukune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e5b4d9-2d69-4320-8d6e-789eaf763e07/how_to_write_a_case_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fa6a7b-3d9c-40c2-b419-500fff9c0089/37266873479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f3cab9-c5ad-4ef4-b824-d08d5d4b0aa6/the_living_world_deluxe_habitat_large_overall_best.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_off0000d7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 4944 bytes
SHA-256: bb9c349fae2bd89f0199fe94f7cb5f0604d672024ca0633bc355d57346325721
font_01_sfnt_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 11080 bytes
SHA-256: 8efc1375a1eea3a07d15ffb514f35a45fe3b83e5cfbeeaec1fef2c22c4a5d4b8

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