Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce020760475f19b2…

MALICIOUS

PDF

68.1 KB Created: 2020-12-21 11:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f395f25d9fe8a9f5fd801148a488e84d SHA-1: e9dc3aff6f39b91b177231e628dfdb667954f16f SHA-256: ce020760475f19b2058fe77d1d1e83e09b475c09028ba14018c8596da37e9ee2
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous external links, including one pointing to 'trafffi.ru', indicates a likely attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=security+officer+training+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5f9b03a06af74.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/1836762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fd8cd7227890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fd3cdfdea003.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/fef7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_5fc63aedd031a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5fb5335e6ae0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f8c528c46c0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5597eb06-9b52-4107-8aa8-895f30a2a1e7/epson_et_2650_not_printing_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93b907b-c39e-471d-9fc4-4cc826c93677/13381925067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8cb007-6608-48d2-a79d-b86ea112bafb/kugigesomunamutikedox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e32532b-73de-4b4a-9400-85edf8199fc7/18679314317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cbbf31-c18a-4097-a937-e6732eb5325b/a_taste_of_honey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2201c5c0-41b1-40a7-a2af-c8dc68747cf6/parallel_fantasy_if_guide.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_off0000cc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7A 5228 bytes
SHA-256: 6298a15c57857933d0cffe195ee9c40b06dd4dae268a2c323c4b10a1295d5c6c
font_01_sfnt_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 11112 bytes
SHA-256: 9546a578117b8c9d7333a7531b1a82eef6e32ee8fa3fd100b891d5dbcf49c936

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