Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4bd86b2af51f58…

MALICIOUS

PDF

40.7 KB Created: 2020-11-03 20:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8e6a9fb288f4581f5a4cb2c2a5890b8 SHA-1: 2179a0db09992c48a90b23a2954b5a9b38962874 SHA-256: fd4bd86b2af51f586e4d9347f285a66c27b2e11d2448435c1317d02662eed009
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=sniper+assassin+1+walkthrough'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

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/aws?keyword=sniper+assassin+1+walkthrough In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f977dfc79355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5f957a42b8218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f920ccb56e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8ec5c257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f9dfc4951301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f9abea2881b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5fa111d7015ad.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
    • https://uploads.strikinglycdn.com/files/71811cda-01d9-4b69-acf3-583859be2649/fufexamopolopewewixu.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/kuketarigededum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ac7e32-3ff0-4c80-8d25-8db110406440/podonakokopizidil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000524b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524B 5272 bytes
SHA-256: 5c28ed0877aa5028d029b31aec56f5e2082a6ff9d6531a538c3b7da1c61d6569
font_01_sfnt_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 10504 bytes
SHA-256: df4cb5f965cfb0a5fdfd19de3bb064bb365bfd097f6edadadc6ba224e1e66396
font_02_sfnt_off00008815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8815 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3