Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba16a44526031e6a…

MALICIOUS

PDF

33.9 KB Created: 2020-09-01 03:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a6bba71c60b2e902c69d24f5f226e29 SHA-1: 399e9c9bd9dc1421a7b8e7aa59977f0039bac077 SHA-256: ba16a44526031e6ae947ecf8421e32f244c7b584e50c9d8b0bf66c96d1c015d0
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wix?keyword=certificate+design+software+for+windows+free`. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading potentially malicious software. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to `static.usrfiles.com`. No scripts were extracted from this sample.

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/wix?keyword=certificate+design+software+for+windows+free
    • https://static.usrfiles.com/ugd/ac72e0_443ea644355146b2b71c0d2d8df4321a.pdf
    • https://static.usrfiles.com/ugd/234f58_4e88fd9a89ef46d3bceb25c58476e897.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_f665e2b6578a40549ab14a050edb5014.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7471/files/blaze_and_the_monster_machines_games.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/knight_shines_bright.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5561/files/kanoribisekapevew.pdf
    • https://static.usrfiles.com/ugd/269bb8_9ee08641534c481c98f4bd9eed5a4114.pdf
    • https://static.usrfiles.com/ugd/b8c837_12cdad824b15451aa7f3ac4998643da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a83a1824b4b04dc091bd4d169c678eb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d5abccfc9204656b8b2e684fdb2f274.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c369762975a41ddad84b8131cc23851.pdf
    • https://static.usrfiles.com/ugd/5e8de6_9fb7e062ffbe46ba9773c55df3be0ac6.pdf
    • https://static.usrfiles.com/ugd/ca300b_e0b0b59dfe2f42be979f923b30d0a8d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5065d4430654d9694216b743f5a4370.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_off000046d1.bin
989168bd08ba0fc13523a201cad0a22a92464658f0aefb61d8292aad932e679d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46D1 5152 bytes
font_01_sfnt_off00005877.bin
cf90006532738db199445214e6f028e4cf38937497f4781424b90b47927429e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5877 10256 bytes

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