Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f16c85567c35482…

MALICIOUS

PDF

33.0 KB Created: 2020-08-30 07:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6feb80c345df90cd09e12f557ee1d5e3 SHA-1: 29a31e1be31546a52aaae8afa0bf6fb58b86c782 SHA-256: 4f16c85567c3548285b76c8c036e26b885cce8ce3b5c3b02030aa3ecbca97258
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=10.s%25C4%25B1n%25C4%25B1f+esen+yay%25C4%25B1nlar%25C4%25B1+matematik+fasik%25C3%25BCl'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring the user to this external URL.

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.me/wix?keyword=10.s%25C4%25B1n%25C4%25B1f+esen+yay%25C4%25B1nlar%25C4%25B1+matematik+fasik%25C3%25BCl
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/73645512994.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/58474719644.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/99272383884.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/8086_microprocessor_assembler_directives.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/86475413540.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/73934647447.pdf
    • https://static.usrfiles.com/ugd/2c8d66_67c98a6bee284d1dba5d4aede88b82a2.pdf
    • https://static.usrfiles.com/ugd/912de2_5c906d2ea43d462ea812dcf9c1955550.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/tojuberat.pdf
    • https://cdn.shopify.com/s/files/1/0449/0782/3259/files/35178788254.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/66977798221.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_off0000405b.bin
2ed9d6a8af678137133f8edc9ec5ac2d3506e109e18d70afa55747fd068c0269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x405B 5364 bytes
font_01_sfnt_off00005257.bin
a7b5ae24abcefb53cbdc39a0f8f8d71eaf39d09918c48b121b40313d588720af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5257 11004 bytes

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