Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4276a26c74a56b…

MALICIOUS

PDF

37.0 KB Created: 2020-08-19 21:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcb74a41048b9f0342a7504e7c5d8e2f SHA-1: b7b421ed83c6d680bc8e2952da4c0dc8d5c3ca6a SHA-256: 4c4276a26c74a56b9b34acdbb3e0be564114ac1f599aad52ff4a5ac5a7612f33
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a lure related to 'Chase credit card authorized user information' and embeds multiple external links. One critical heuristic indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or scam attempt. Another heuristic flags a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm designed to distribute malicious content or improve SEO for malicious sites. The document body, though partially corrupted, contains the same credit card lure and the malicious redirector URL.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=chase+credit+card+authorized+user+information
    • http://files.marvelousgracehymns.org/uploads/1/3/2/6/132695493/bc10d8df15798b.pdf
    • http://files.emergencyresilience.com/uploads/1/3/1/3/131397955/kebusub-rijinudepeno.pdf
    • http://files.knimanumc.com/uploads/1/3/1/6/131607712/rejosebomijum.pdf
    • http://files.dramydc.com/uploads/1/3/1/0/131070581/fowosike-viduxenub-togewopunovepop.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/cambios_sociales_en_el_adulto_mayor.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/antecedentes_histricos_de_la_administracion.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/lekonibatifawiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/fubodofudo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/39181118011.pdf
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/78177439232.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/81084723790.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/xopoda.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_off00005581.bin
0cb99893422c6205be592afd83ce5385d27374023da47ea2bfc247d285526501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5581 5184 bytes
font_01_sfnt_off000066fd.bin
61a63d00d8bd0bbb442efdcd84055f8cc5bd1adf98918293a6f57b080a559d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FD 9516 bytes

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