Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aed231399e0047b…

MALICIOUS

PDF

49.9 KB Created: 2020-08-29 20:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c30908e5ecc13047cae730fd3a7a75d SHA-1: 1e6022dd408c3b5af9f7cfc6cffc87df32334e18 SHA-256: 9aed231399e0047ba8da070b4fa115ddd8431120bfb63cff6925070a18854f19
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=mk1+weapons+warframe'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a broader campaign to distribute malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=mk1+weapons+warframe
    • https://static.usrfiles.com/ugd/b8c837_bad49abe751b4e6fbf4d31c8e0ebd9e1.pdf
    • https://static.usrfiles.com/ugd/61b8bf_b7ae8d4c0204438c8c685925fd5687d0.pdf
    • https://static.usrfiles.com/ugd/77941b_300f2d0c9cc24b77b6d66d4112358b47.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/pepopibofobesuledevevomix.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/69098582742.pdf
    • https://cdn.shopify.com/s/files/1/0464/6384/4520/files/nemovifageku.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/19049240235.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/biochemistry_lectures_for_medical_students.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/famonetubebinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/introduction_to_the_foundations_of_applied_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0446/6583/1577/files/un_millennium_development_goals.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_off000084cb.bin
625efd293cd52d0440364ed6018853cd5b3a413541f716ddeedb6514b73e6432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CB 5228 bytes
font_01_sfnt_off00009696.bin
3916c059dc92590f68b9d83bbadc071df8b20e419eb91f25eed964c45ebd2895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9696 10620 bytes

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