Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a605e166412751…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 01:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d0b13987f4bf63f4305914e093d17cd SHA-1: 56d4ee22a4cad30ea10af5a3f793c8f52bbcad68 SHA-256: 46a605e1664127517714eccdaeb6bc19bd82eb6e3c48060e88ed836c4773cc86
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=walter+kaufmann+nietzsche+philosophe', which is also listed as a suspicious URL. The presence of a link farm further suggests an attempt to distribute or 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.ru/wix?keyword=walter+kaufmann+nietzsche+philosophe
    • https://static.usrfiles.com/ugd/277b62_f6692a318cff438f8c6604b398c69a84.pdf
    • https://static.usrfiles.com/ugd/b8c837_b045058898184f6b8774cabba4cb35ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_aafe7d4a9c8c49fa97a38022815f22f7.pdf
    • https://static.usrfiles.com/ugd/fbccce_df5580f91cf5487486e147103108d8e3.pdf
    • https://static.usrfiles.com/ugd/c7a620_48ae38f852b04afaaae63b8dfe4859e4.pdf
    • https://static.usrfiles.com/ugd/5ed537_bc13353c66574d82bd2dae810fa9416c.pdf
    • https://static.usrfiles.com/ugd/739437_e7ffff860e524ca3b3ecb47fdc7a04d2.pdf
    • https://static.usrfiles.com/ugd/cc14e4_8ba2676516ba461e8b3a8c1db5f266c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83cb3f7aa5748c1ab91b8ec145a8655.pdf
    • https://static.usrfiles.com/ugd/b8c837_8721ec39ed8242659ef8b3856c7e077f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8758fbd13a154e019d46c88081db4d8f.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4b828601c5784d63b253338cb606b7b0.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_off00007818.bin
3faceec9e5d51576154f61b1832cbfc14db65e5cff91e0de118f3f10316c78d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 5380 bytes
font_01_sfnt_off00008a4d.bin
cd52657c484af8f38d34583ce99284fb2e87310692211ed2cb1ce814e45b6185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4D 11280 bytes

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