Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb5cac27f764aea…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 18:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb9e23ded10a6c82a9ef1c80a21cbeb SHA-1: 4038475008b5855180bf4afa9aafca0aa3652ca0 SHA-256: 4bb5cac27f764aea1aded6b623fc09db38a85006cccd1e315e0865221ca3e3f6
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a promise of a 'Parallels desktop 12 activation key'. The document body, though heavily obfuscated, also contains this URL. The PDF also hosts a large number of links to other PDFs, likely for SEO poisoning to increase visibility of the 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=parallels+desktop+12+activation+key
    • https://static.usrfiles.com/ugd/b8c837_b93571abed06496fb3398a01090fb8a3.pdf
    • https://static.usrfiles.com/ugd/97634b_0bd0a36d36f34cf98f684826d428d8c9.pdf
    • https://static.usrfiles.com/ugd/b52961_3bb1a1044a87425a88e9b69376c1124c.pdf
    • https://static.usrfiles.com/ugd/b8c837_60e58ff5224a480da5784657af1b4e42.pdf
    • https://static.usrfiles.com/ugd/4b68be_b868ccd603ee4c4baf08c7cfba794a70.pdf
    • https://static.usrfiles.com/ugd/590778_218c2b1c511245a881319f8f9ce5d373.pdf
    • https://static.usrfiles.com/ugd/de65f7_bcc03de399044503b58db698245e53e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_aef4a56c6d534256a526c5e6a576f322.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/interview_tips_books.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/60984318490.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/35189949567.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5696848cac0416495bc3612a45339a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_298ee1e7a83942a7a0095428a4252210.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7f236eb8bf84af8bce360f1a50728c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fdff3a61d7f462f93651ce9a8c31382.pdf
    • https://static.usrfiles.com/ugd/b77b08_1b50b1ca2ca6473f8fd4bfbfe7d57c56.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_off00006629.bin
f6f3ba8995ca87821ce3680369368bd930344da507786713e7ad6d930a8fd94b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6629 5480 bytes
font_01_sfnt_off000078ec.bin
9e98f893e45ada77d067f455bd7c890d20a84bd1c3a26eb335f7eac8690108ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EC 10304 bytes

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