Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5bd5e3f1c3c12a…

MALICIOUS

PDF

65.8 KB Created: 2020-07-29 03:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032085b326937c32ed753d779bae4fa1 SHA-1: b60c2565cef0345176b79fb711ee505426ba3be3 SHA-256: ce5bd5e3f1c3c12abeed95226f30719e8e12d76efc67d9e8fe7fefd125eb7541
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify-hosted PDFs, likely as SEO lures. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users through these links to a malicious redirector.

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.
  • 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://ttraff.cc/wb?keyword=s%C3%A1ch%20kinh%20ph%E1%BA%ADt%20pdf
    • http://files.ipac-victoria.ca/uploads/1/3/0/9/130969470/basem.pdf
    • http://files.goldlawcolorado.com/uploads/1/3/1/3/131383982/zenafemi.pdf
    • http://files.ioscaid.com/uploads/1/3/1/6/131606275/musoj_ragunuzafal_jetelusibubavaj.pdf
    • http://files.bddwa.org/uploads/1/3/1/4/131406498/2e359e6f.pdf
    • http://files.johnphilliposborne.com/uploads/1/3/0/7/130776712/liwebukepolal.pdf
    • http://files.ioscaid.com/uploa
    • https://cdn.shopify.com/s/files/1/0436/7505/8329/files/727046866.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/62997614361.pdf
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/97792036681.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/4989093221.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/ropabebogegezufanekika.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3475/files/89141011665.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/58184317818.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/jiboj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/rubij.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/75421887708.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/34123818307.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b85d.bin
8a5a1ec4b828c3c3f3d66d10978becba53cfc62dcf0bc6dadcedfa3f7a6a2fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB85D 4948 bytes
font_01_sfnt_off0000c88a.bin
645a21d3f53f9ba55ed4585e54b1dbbe582c66e5e5e390b275778ac6132a41d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC88A 22744 bytes

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