Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c6717f833422f7…

MALICIOUS

PDF

45.4 KB Created: 2020-08-15 09:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43bf4da98862f0956a8c1e5558dc3af3 SHA-1: f252b86d9df72db49bc9b4cd997a08e3c7dc98fb SHA-256: 92c6717f833422f719bd608a69baba5c3ee9a88849cfe407aa31105f8e372712
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=diabetes%20mellitus%20fisiopatologia%20pdf%202019'. This indicates the document's primary purpose is to redirect users to a malicious site. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though partially corrupted, contains the same malicious URL and appears to be a lure related to medical information.

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.cc/wb?keyword=diabetes%20mellitus%20fisiopatologia%20pdf%202019
    • http://files.mistimurphy.com/uploads/1/3/1/8/131857602/51baff84c1b.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/44596227424.pdf
    • https://cdn.shopify.com/s/files/1/0430/7625/5897/files/kubamejotimufegukewerobit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/62307855406.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/22757673418.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sefumiwizekoreletete.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/rebokosisewegutopelonorep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/punjabi_movie_ardaas_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/pejewalok.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/kelulukezoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1473/files/jojifapokudawita.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_off0000731c.bin
307c33a2c15d680c142236f14196085a927de82fac32b50b280b036eb6eee420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 5884 bytes
font_01_sfnt_off00008713.bin
f47be59ca5617636f1e5f02dccd0694807da91d39dc2865480df72c76ff927b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 9996 bytes

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