Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd420c9e17bb1c5…

MALICIOUS

PDF

40.8 KB Created: 2020-09-30 19:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c3773cf128a89557e42efe25f2ea018 SHA-1: 4fa0fa6c80ebddaa927734457aefa0f022050b7e SHA-256: 6cd420c9e17bb1c5b579b87e617fd477fd7a0519ef35e8b4c0f6c0fe83c8c4cc
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains embedded links, one of which, https://gettraff.ru/strik?keyword=3ds+max+2019+new+features+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the same URL and other suspicious PDF download links, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/strik?keyword=3ds+max+2019+new+features+pdf
    • http://files.centerforpentecostalministry.org/uploads/1/3/2/6/132681579/38ed99.pdf
    • http://files.sondrineleebontemps.com/uploads/1/3/1/4/131483830/9a2769.pdf
    • http://jeguv.phulrev.com/uploads/1/3/0/8/130873784/86f97.pdf
    • http://sipit.worldofsong.com/uploads/1/3/1/4/131453850/sejevusemusopuk.pdf
    • http://files.cliffordsage.com/uploads/1/3/0/8/130874389/8384446.pdf
    • https://site-1037275.mozfiles.com/files/1037275/nibukepusimojosidan.pdf
    • https://site-1036680.mozfiles.com/files/1036680/xobijolitigex.pdf
    • https://site-1036982.mozfiles.com/files/1036982/ripakarugewusuruki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/570b871c-af40-42c2-ba52-c6950eae9dfe/20863317473.pdf
    • https://uploads.strikinglycdn.com/files/d187048f-e258-4c95-8ded-5b8a8e6720d1/vatozidebanoxokesekukal.pdf
    • https://uploads.strikinglycdn.com/files/69f58580-7e86-485b-a851-d9017a7ee7a9/dusodubaxitesudujinami.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_off0000604b.bin
abd28bd8765544c0ab53d6ea8e2dd6120830d68a6a8c17351434cea2d6ed0f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5864 bytes
font_01_sfnt_off00007440.bin
d033b94d72564fcf3461d08a28e768b12651a8523a3fffb8a10301b6b1bd699c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 9932 bytes

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