Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ec15d29e83f31e…

MALICIOUS

PDF

46.9 KB Created: 2020-08-24 19:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 636655210c88e2a2df4b9e1cea82f556 SHA-1: 65b92a2515d5b0d916d4259111e5d110680ae6b5 SHA-256: f5ec15d29e83f31e5e32a06f31d69c2d0faaa7bb3ae5b4514e2679fe7ff150bb
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/pify?keyword=types+of+parasitic+diseases+pdf'. This indicates the document's primary purpose is to lure the user to click on this link. The file also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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/pify?keyword=types+of+parasitic+diseases+pdf
    • http://files.ewan-macintyre.org/uploads/1/3/1/8/131856331/zevalulitepixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/kafutigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/48270817045.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/41468774534.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/armando_alducin_libros.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/48224680845.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/73665960373.pdf
    • https://cdn.shopify.com/s/files/1/0430/7615/7607/files/googly_film_hd_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/rinibirexiterifejabodoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/puvagetevupefipukagi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1891/7787/files/space_3d_wallpaper.pdf
    • https://medlineplus.gov/parasiticdiseases.html
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0f.bin
4555b79ff9b28ee7d053a589a3d22747a5769922c5d8a07e7ff1ec75acc6714e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0F 4848 bytes
font_01_sfnt_off00007dab.bin
8523708a8f20134a03833c0c3dabc583000a8ba2cc539a077a18f834ed8c0341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAB 10328 bytes
font_02_sfnt_off0000a0fb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FB 4324 bytes

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