Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccf149bcb2b53b5…

MALICIOUS

PDF

32.9 KB Created: 2020-08-29 18:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424006aa881aa5ed8df9c987c4684d7c SHA-1: 10ad8fc5f1d1642db16f28b2e908f6d9eb6a260c SHA-256: fccf149bcb2b53b50e0a9a933fb6400eeb4db8c84d95b6bebd741713c2309116
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create SEO spam or redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/wix?keyword=seiko+solar+chronograph+watch+manual`. While many other links point to benign Shopify domains, the presence of the malicious redirector indicates a high likelihood of malicious intent. No scripts were extracted, and the document body was largely unreadable binary data, but the link farm and redirector are strong indicators of a malicious campaign.

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=seiko+solar+chronograph+watch+manual
    • https://cdn.shopify.com/s/files/1/0436/5425/0654/files/tarubarorelozabesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/76914834932.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/mega_link_generator.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/70316302215.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/sinus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/63454233274.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/pajapaluf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7261/files/94426277416.pdf
    • https://cdn.shopify.com/s/files/1/0452/2383/7856/files/school_vocabulary_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/nuzaz.pdf
    • https://static.usrfiles.com/ugd/b98abb_40a06d9a0d7e44489d1dfc7bda7ebfba.pdf
    • https://static.usrfiles.com/ugd/269bb8_7abb8ded0c49435b83830ce3c31adf70.pdf
    • https://static.usrfiles.com/ugd/253000_9638dbd4cc7d40a39ce7a2d08709693f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63621dc43304f2ba6b4accc554dcec6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09e7c95316f4fa48aca75a811768719.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_off0000434a.bin
b7e65f6ac8616405e8a400e6e52c5945f41644c37b853dce3a923f2addf071c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x434A 5604 bytes
font_01_sfnt_off00005639.bin
253130116c8582cc01d88af90c20a3666ba17fd31dc0040eb4b3e22a9075df93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5639 9488 bytes

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