Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cc334f4751a370…

MALICIOUS

PDF

34.7 KB Created: 2020-10-29 23:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec0692efb0c6d961ee8b228f109027a9 SHA-1: f2baf50f62457d90720511aef92848e504335036 SHA-256: d3cc334f4751a370d97eb805af0389071f263199a7427508be08dca778c1a319
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL related to 'monte carlo tennis'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the ML classifier also flagged the document as malicious. The document body, though partially corrupted, contains the same suspicious URL, indicating a likely phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=where+can+i+watch+monte+carlo+tennis
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5f935c7ecf06e.pdf
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8e5bda4d34a.pdf
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f8f4eb531276.pdf
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f90369a538e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/desiwukulotabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/android_emulator_pc_pokemon_go.pdf
    • https://uploads.strikinglycdn.com/files/bc45c77d-0424-4268-af46-d02c45c91680/34103135303.pdf
    • https://cdn.shopify.com/s/files/1/0503/0127/2229/files/technical_college_application_2020.pdf
    • https://cdn.shopify.com/s/files/1/0483/7264/6046/files/ap_human_geography_midterm_review_answers.pdf
    • https://uploads.strikinglycdn.com/files/63c5a3ff-951d-4be7-b17e-2e45947e5ae0/romemiz.pdf
    • https://uploads.strikinglycdn.com/files/9e8b9d6e-cfe5-4003-b834-ed2ef15961be/32539698094.pdf
    • https://cdn.shopify.com/s/files/1/0496/6006/7991/files/29634876835.pdf
    • https://cdn.shopify.com/s/files/1/0479/6953/4108/files/mercedes_2020_glc_300_manual.pdf
    • https://uploads.strikinglycdn.com/files/8f09d8c1-0588-4e09-bdc0-7ed1c6b7ef11/18962527398.pdf
    • https://cdn.shopify.com/s/files/1/0507/8823/7483/files/sojomi.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d0.bin
9c658405abcc064bfde0ebe50e78ea3ba2d02d4a12a56468ffaab16afc7b59e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D0 5144 bytes

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