Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fa0989242f3a0e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-30 13:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7715f90ef9ee10e27a470a07f73edda4 SHA-1: 4db6da5e91b7ea79706cf17fa16a67745170ffe1 SHA-256: 30fa0989242f3a0ece7327043ef350d78ecc3150590974e165d43a4d9c4c8717
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented in the document body as part of a "Handbook of fractures" lure. The file also contains a large number of other PDF links, many hosted on static.usrfiles.com, suggesting a link farm or redirection strategy. No scripts were extracted from this sample.

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.com/wix?keyword=handbook+of+fractures
    • https://static.usrfiles.com/ugd/b8c837_ab1ce2e910374072bfb857a175e262b6.pdf
    • https://static.usrfiles.com/ugd/760101_0faf7173eb69482c8bb8d9fc03aa60b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eb12e43ac1a4dfba1729cfb09986dba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/18376579079.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/73155298269.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/91362933150.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/vi_save_file.pdf
    • https://cdn.shopify.com/s/files/1/0450/7978/9733/files/adda247_monthly_current_affairs_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/tunure.pdf
    • https://static.usrfiles.com/ugd/f96b02_e29621dc1e104415a8ffea846a3d437e.pdf
    • https://static.usrfiles.com/ugd/b8c837_baae777784bb4397a14ffd8809009b05.pdf
    • https://static.usrfiles.com/ugd/7f46b5_aaf9265098504381bfc8eb2bd586c817.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_off000052e2.bin
9a5bac49aac0da65b6a7785756e5e8c9c9ce73aac56e827c771470452a18edd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E2 5148 bytes
font_01_sfnt_off00006468.bin
abc62748f853e2d16cc94dc481657a82938061991e1a96be94520d800ce0c4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 10224 bytes

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