Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf7682bbc8bd139…

MALICIOUS

PDF

38.4 KB Created: 2020-08-05 00:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51366c1d0474639f3cbe6aff8640e9a9 SHA-1: 85676bcfb3bffb23ade97bd8e2f2c70194cf4834 SHA-256: 4cf7682bbc8bd139759909ba922335e8e84019f0322e25f75c470aaae3aa8c58
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.ru/pify?keyword=certificate+of+completion+and+compliance+pdf`. This indicates a social engineering attempt to lure the user to a malicious site. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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=certificate+of+completion+and+compliance+pdf
    • http://xokis.portraithomesnh.com/uploads/1/3/1/4/131407263/vuzogu.pdf
    • http://files.artistscorner.gallery/uploads/1/3/0/9/130969206/2318.pdf
    • http://files.restyle-homestaging.com/uploads/1/3/2/7/132710665/9463677.pdf
    • http://files.wisconsinhardyplantsociety.org/uploads/1/3/1/6/131606011/3057d903f8.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/catfish_farming_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/sigipobojafiruwesefoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/capitalismo_socialismo_e_democracia.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/xewekanudufajus.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/84881414028.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/wijod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazutorigixasozesilax.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/levidufodobitivevuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/32959290186.pdf
    • https://cdn.shopify.com/s/files/1/0440/2236/6366/files/xipiporini.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/marez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/12433637207.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_off0000590c.bin
67538fc5eed89f84f36862954bbbde049debb2bb68914ff44f36a202e194fb87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 5028 bytes
font_01_sfnt_off00006a0c.bin
2ca5e6dd6d2b59eb09bea836903ea2780c4c82a599ee2ca1676e66e720897f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 10164 bytes

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