Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ad7168399d5da6…

MALICIOUS

PDF

76.2 KB Created: 2020-09-06 02:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf800887830868826843d5890e79ce5 SHA-1: 62d4e7d856bbf79be7fde4c7a9fa1c34fcb1802e SHA-256: 41ad7168399d5da6ee649511944c5cc3aab0de2f779e7b217066d515c56cab04
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, with the primary one being a redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=dave+chappelle+equanimity', which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content.

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.link/wix?keyword=dave+chappelle+equanimity
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/90673451911.pdf
    • https://cdn.shopify.com/s/files/1/0451/0312/0537/files/histologie_du_tissu_osseux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/wuzuvokakadeborajirivex.pdf
    • https://static.usrfiles.com/ugd/f34323_074c249df8b7460aa0ad2d9c635ce639.pdf
    • https://static.usrfiles.com/ugd/9374a7_f0ebeaffb15f428fa62a9f24856ec3d6.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_dc1c4fcb89124aa29fb25b5d44a111fc.pdf
    • https://static.usrfiles.com/ugd/a298ce_2d17dd7c5c23436ab7d45c253d5b2fe4.pdf
    • https://cdn.shopify.com/s/files/1/0437/6166/4154/files/69895840784.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/d3_football_boards.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/8319613722.pdf
    • https://static.usrfiles.com/ugd/a31856_d6b53adc7c204c4f9e75aad5b0e3d790.pdf
    • https://static.usrfiles.com/ugd/ce4b7c_5427b81068144d23891c510765813f69.pdf
    • https://static.usrfiles.com/ugd/8acad3_f0b94557fa674c4a95f48de17904e348.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_off0000eb00.bin
d527b90c9390678260fa9d06e997da3c229dbf9960d7a69ac0f00b8bf3f5fd3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 5184 bytes
font_01_sfnt_off0000fc9c.bin
08ca20cf7ff20c88e10bc5f5f3d282cd151ce7acdd64a65118d164ebfee9ed89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 11628 bytes

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