Malicious PDF — malware analysis report

Static analysis result for SHA-256 25552906a8591f17…

MALICIOUS

PDF

69.8 KB Created: 2020-11-04 01:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4cbf0f0c902fc33056ec69793adf4ebd SHA-1: 2334c868a7e7d3b1050de46d384bb0506e9c7b46 SHA-256: 25552906a8591f1717178d80216e4d59742a1444938398d1e9dd21c40a169c3a
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.club/123?keyword=queen+eleanor+memorial+cross In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5f8f8603cb664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f91d6302afd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5f9c5249791c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8cc712561aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fa1e11af3755.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/libowebujakux/70858664088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1328e3ec-d07e-465c-a27a-4f32fef4dd20/development_of_the_nervous_system_sa.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/tekemesegovewipaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/74361680484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19adf68-ba10-4796-894d-d4ad7fde8594/muzavukufudemixubokodu.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_off0000d2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F8 5008 bytes
SHA-256: d2f7e4421fa62387463365d9e0cf74b863ae2c143147b33832ef403ba12a2a78
font_01_sfnt_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 11840 bytes
SHA-256: e140dd13a8b04f1044aa9a252f9a2c7625106ea5f8fc5dca865a71402166a129