Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5c07c2c2e82033…

MALICIOUS

PDF

144.9 KB Created: 2020-07-31 22:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba8b586d333612666549c8d3021edaaa SHA-1: 38f3bbbe29fc77f356b09d5ad7ece5e0a25d0ced SHA-256: 5b5c07c2c2e820332e61b584ec3cce997564e89d86fd254543413def4e98f87d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cold+45+gungeon'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=cold+45+gungeon
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.dburbancommunities.com/uploads/1/3/1/3/131380299/boxukafus-nivixamol.pdf
    • http://files.nhage.org/uploads/1/3/2/3/132303322/04859f66217bb9.pdf
    • http://files.eringilbreth.net/uploads/1/3/1/4/131438611/vusafusabovavo.pdf
    • http://files.shopbellerebelle.com/uploads/1/3/0/8/130874284/3e578f659121af9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8502/7746/files/71271881600.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/80091861149.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/4555658185.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/20637586336.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/jebajute.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/46622656221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39843759369.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/risafijawuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/71368972136.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/pudiximola.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002021b.bin
775d1fca4247545a8cd68edb94a6b930b5365f6e59d8383ad085097c624faf5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2021B 4628 bytes
font_01_sfnt_off000211f2.bin
21ae195945be143fe8256f77b98b0fc78635d47ec251f034d491634435a269ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x211F2 10696 bytes