Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd22bf1c2fe494a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 07:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 871020ecec87fd3a1360d8aae5630b9a SHA-1: 1c11e1708b46f8d12f5a94bd6de6fd6e59632566 SHA-256: fbd22bf1c2fe494a26f3e74061574a8b014e76f95eb3cb30a9c53d55104d28d5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a link to a known malicious redirector at 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The document body contains garbled text but includes the same redirector URL and a reference to 'game offline android terseru', suggesting a lure. The primary attack pattern appears to be SEO manipulation or hosting malicious content via a large number of external links.

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.com/pify?keyword=game+offline+android+terseru
    • http://files.challengerelementarypta.com/uploads/1/3/1/4/131406735/8538177.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/foborinaxogaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/41245369217.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/vuteburepefuvesinedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/15675821873.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/bujuneta.pdf
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/tonilaxubetun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/engineering_drawing_book_nd_bhatt.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/siletozubifupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/nutatojotusewiganomapuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/4696540620.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_off00006595.bin
e9e7f9e2c521ba9d4ff17a5ab45e7486892d4191b37620441842f73af28821f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 5084 bytes
font_01_sfnt_off000076cb.bin
712f1e7251cbcc5b86494e5f6dfa632a1afe4d5170c6080301208e7b083e37b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 10224 bytes

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