Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c21cb96c71cd653…

MALICIOUS

PDF

66.9 KB Created: 2020-08-22 22:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d606aa51a9cbaac82bce088593fd8ef SHA-1: 6603357f8b36f5bcb4bedde5c80f46ea6e86d852 SHA-256: 9c21cb96c71cd6539089694322baea4ed33159404946e19d6eafcec015d0e988
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.ru/pify?keyword=baclofen+davis+pdf' points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0431/1685/5453/files/31454075559.pdf' being one of them. The presence of urgency language in the document body further supports a phishing or scam attempt.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=baclofen+davis+pdf
    • http://zopos.theformingspirit.org/uploads/1/3/1/1/131164392/wujoninepesin_vilifirulajabos_befufepax_nixifotofer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/31454075559.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/bugisoxibofemakigudix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/28295402008.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/77796772131.pdf
    • https://cdn.shopify.com/s/files/1/0429/3014/3395/files/resize_file_to_smaller_size_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/pathology_mcq_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/bidoguzutasiwisifu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9302/3133/files/fovosegedi.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_off0000c8ed.bin
410687f8d04217cbd44b8c5f638891628c3f25d0ab95cb9ec73e2f7d42d9951d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8ED 5164 bytes
font_01_sfnt_off0000da97.bin
c49c9b71e30d30bd8e71253f0e2a7675bfbe4ed70d842f1ffd808f986395316b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 10736 bytes

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