Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afc3b73d54c2aca…

MALICIOUS

PDF

39.5 KB Created: 2020-08-04 03:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 625750803b720d508b8584d238e10e8e SHA-1: 5007fccf4dab7f6f9acee1e9c84d99ed86daff00 SHA-256: 4afc3b73d54c2aca603dcd946ffc26eeed8d4de85d08db5cff3b312c22ba8769
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'https://ttraff.ru/pify?keyword=definition+of+family+structure+pdf'. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection tactic. The primary intent appears to be directing users to malicious infrastructure.

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.ru/pify?keyword=definition+of+family+structure+pdf
    • http://tovaj.theunexpectedwidow.com/uploads/1/3/2/8/132816202/kiwogixavagigodatiz.pdf
    • http://files.wallingtonanimalrescue.com/uploads/1/3/1/1/131164556/5388895.pdf
    • http://files.lsegc.com/uploads/1/3/2/7/132740277/5875904.pdf
    • http://files.thesouthchurch.org/uploads/1/3/0/7/130775727/gitufuvokamufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/94266017588.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/webarikabojimegakepugiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zuzasujidedipojopoxetax.pdf
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/rijapawinokur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6597/files/96694726324.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/12671306122.pdf
    • https://cdn.shopify.com/s/files/1/0429/9312/3491/files/11707890889.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/64298184512.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/32889315949.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_off00005d44.bin
818be4f414f8226baebf6f5083a90919ced2809d52cbb46cf6ef4be9a6b053e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5404 bytes
font_01_sfnt_off00006fa0.bin
0529922979723544e5950fafd7c934890d2cca1e0949bbe2e4b83c6fbd6fdb3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA0 9864 bytes

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