Malicious PDF — malware analysis report

Static analysis result for SHA-256 3611b5fb44cb7642…

MALICIOUS

PDF

37.7 KB Created: 2020-09-02 19:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5bf9721aea6c570db5e9b5a73500b5 SHA-1: 5f6fcfbca727cee763ea2ca6b817803650ce9939 SHA-256: 3611b5fb44cb7642f5e4f76f001f30842ae010a24957eb2e6df5850e80415794
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/wix?keyword=park+tool+bicycle+repair+manual+pdf', is designed to lure users into clicking it. The document also contains a large number of embedded links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or traffic generation. The primary intent appears to be redirecting users to malicious infrastructure.

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.club/wix?keyword=park+tool+bicycle+repair+manual+pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/27412613637.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/takasekijawefapomabe.pdf
    • https://static.usrfiles.com/ugd/738632_d885c2f88de042b28be8ef0ae14a0539.pdf
    • https://static.usrfiles.com/ugd/b8c837_05993c81144f4aa2b98467f1fba49b0c.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_4871628f791742d6a33bb19d485a87fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd1557c1c2947198157ca595f286777.pdf
    • https://static.usrfiles.com/ugd/83f04e_92c58b15932d4ceb8c61f3c3920e67fc.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/les_asymptotes_cours.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/dobanenekinagutelaxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/gokubirumazozefem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/cantico_delle_creature_spartito.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_off000054b6.bin
52fcc163c0f61416b4b64b4b20ec87cba4cbc8a8227cb288adc99d74c834de64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B6 5428 bytes
font_01_sfnt_off00006721.bin
c5a5f1d1b71c9afae97c6d0c2c81e70fd50bebae83f5e9f84ab2fffbf6eb5739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 10244 bytes

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