Malicious PDF — malware analysis report

Static analysis result for SHA-256 a586f925bfcda20c…

MALICIOUS

PDF

36.0 KB Created: 2020-11-04 16:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eba81792e65e7a47b72dc85262f26eeb SHA-1: dc6a7baf678559bbc4e93c1d2b3ad82672c5ab11 SHA-256: a586f925bfcda20cdc39e656923c51c837385071d4de94f74f221c52814d9401
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/strik?keyword=central+perk+logo+png' is identified as a primary indicator of malicious activity. The ML classifier also strongly flagged this PDF as malicious, suggesting a high likelihood of malicious intent, likely to lure users to a compromised site.

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=central+perk+logo+png In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5f8941955002e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f87f1a723739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f98c2e2bb711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f95926347231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8d07aa8bf4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8b3987f03a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5f91949bb4b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f8a63a826c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5f9c8169e22de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f9f3738ec76a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8806204836c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_5f91da75b6c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f9f2d5a077ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f99a64d6f7ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4251 4636 bytes
SHA-256: 5b8d79324c63b9699eed9d99f2c6fab273c4193ce28af02237bf01be8198526c
font_01_sfnt_off00005221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5221 10348 bytes
SHA-256: 813e84ab4764a394653a2c2c1e771d2b93039241aa604832d67536cca22a8d28
font_02_sfnt_off0000754d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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