Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e40c9f179106583…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 19:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959519ac3fa146735f9c9b976e9107b9 SHA-1: a1a524eaaa5392cb2341dccbc04154b1d6d56e39 SHA-256: 9e40c9f1791065837d3660f8b770cd40f90579ca9f5db39649f8df93a72ba55a
120 Risk Score

Malware Insights

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

The PDF file contains a link to a redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'Airtel Kenya manual internet settings'. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, pointing to various Shopify and static.usrfiles.com domains, likely for SEO manipulation or to host further malicious content. The primary malicious IOC is the redirector URL.

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=airtel+kenya+manual+internet+settings
    • https://cdn.shopify.com/s/files/1/0463/1049/0277/files/97074187134.pdf
    • https://cdn.shopify.com/s/files/1/0430/9847/2605/files/wofusomekuzifogesu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/65019306568.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_682bd5d3d56d45cbb3128743f5b3d2a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fb30e0e92f4478ca04f1c38d6a0d4a5.pdf
    • https://static.usrfiles.com/ugd/fa6f14_dec776069c1e4c3881f82194e9c9277c.pdf
    • https://static.usrfiles.com/ugd/b8c837_35d3db8336d54936aa31c4e28ce2f8f0.pdf
    • https://static.usrfiles.com/ugd/270e53_1c74512e6f55456398be1571ee095cc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c9ac6d87a2b44e1a8b8648094a9387c.pdf
    • https://static.usrfiles.com/ugd/c345b0_365e65bf8fd9471b99aa88c1bb2cb3e4.pdf
    • https://static.usrfiles.com/ugd/b444d4_f1ad3860f3714a5696a9a2e728b7fef0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4180453556b74d8f9be19202241c0252.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_53862e961a754747b9b33faadf09dc4f.pdf
    • https://static.usrfiles.com/ugd/63d3ad_47fb57dbcfd241f094659067cc1f28f0.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_off000068ef.bin
12660f23015c92ce421195d86dcffe8dac8736b4f8d9921c4b477c8189619e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5160 bytes
font_01_sfnt_off00007a75.bin
701585d80114bc706699f797ee7b44e79da2a0a05715ff7f8ce5c85d7c12b178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 10168 bytes

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