Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa4dfa1b5a04ed0…

MALICIOUS

PDF

32.8 KB Created: 2020-10-09 19:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e236ab8e9e5caa55128095848bcee351 SHA-1: d8de9d6a129520b835c71caea479ebb5c1f7a1c3 SHA-256: eaa4dfa1b5a04ed0848830d3c7849fd1b4281d6894133415c8dba79db901b534
152 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm and 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 0.9994

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.
  • 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.
  • 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://cctraff.ru/strik?keyword=native+american+folktales+with+morals In PDF document text
    • http://files.sparklyoils.com/uploads/1/3/0/9/130969686/61ff0aca9f5597c.pdfIn PDF document text
    • http://files.mgarrigan.com/uploads/1/3/1/8/131872087/1133776.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/ec789246-a5dd-40c4-a0cd-e3193b75c1de/nipeziginakiwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de22456-d891-47e9-b77a-f19c756afdb9/54457871408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d608c9-2675-41c0-beea-479058ee1156/rijezedanaruwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f57e0c8-89ae-4e50-8907-9e120e9fd1d6/96402599276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883535c9-8b36-407c-8e3c-8aadfe193774/15721275196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f88fd8-83a5-4909-a34a-00e2deb61790/19595649687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66481d10-9faa-47c9-9775-68755530dfcf/movefitopusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e3da60-a05f-4c39-bb21-77dedfc9f783/6770199778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a704a9a7-eab8-466e-9ecf-05463737bf7b/nojavozomat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385e4889-ac09-4502-89d9-15a80a7d5c46/14791417283.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5092 bytes
SHA-256: 599045f11773aec1150f3083c5d2e0f595d31833d1fe157b39c847173210c28c

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