Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5dbead7c467dea…

MALICIOUS

PDF

68.6 KB Created: 2020-11-20 07:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc3f3b827a51e2dea88cfc020764251e SHA-1: b5440b32bf0c7a4c18f1d6f5cbba4a5d4b060170 SHA-256: 0a5dbead7c467dea654a3ec4d103ffdbc02047dd2f2af9cc4d20181cc0872ba2
94 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 flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/123?utm_term=evaluation+vs+description+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8f72b046adc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f87a9a3ad161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5fa7b2f29ba2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f8b15cb4e202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8c9a022986a.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/2fe4519e-e632-4cb9-b356-6531960de752/rojexodup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea557d3-18d9-48e3-b69e-acb575a3d648/zulazulol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1fa24f-8988-4bd4-8170-08dcded7eac4/90291657158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687f58f9-c801-4fb5-a100-94abc3ebeffd/88495957485.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/wulokox.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_off0000c59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59E 5184 bytes
SHA-256: ee1a30d2a939a6fa381fc8497b88855be23c356ed25e3d0e7f9b61123cbc2035
font_01_sfnt_off0000d729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD729 9452 bytes
SHA-256: 5670dedd646d3b388daaa915704355227cfdaf7cc1aff1d6c48c26fff69d7d46
font_02_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34