Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b050e7f0815500…

MALICIOUS

PDF

45.8 KB Created: 2020-08-29 08:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 805597e6b93fb049970cd107c336a405 SHA-1: 8a9e7d8e9f1a381bfd0c270a6b8ea200b116bb69 SHA-256: e0b050e7f0815500bcf9f8fc3967dc2c52072c364359936cecf241fe74c2511a
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious infrastructure. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=clyde+torkel+chicken+pit'. The document body contains garbled text but also includes the same malicious URL and a large number of benign-looking PDF links hosted on static.usrfiles.com, suggesting a link farm or redirection strategy.

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/wix?keyword=clyde+torkel+chicken+pit
    • https://static.usrfiles.com/ugd/b8c837_4c67fbfb1ab3412b8c51238a5b2b6145.pdf
    • https://static.usrfiles.com/ugd/b8c837_f454b93d6fad41bc85e70e7b7c8c3dd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba881b756674e429f852991f1cceaf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_620011206012453e89e1da7d9a111f2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/63851144363.pdf
    • https://static.usrfiles.com/ugd/b8c837_35130c0df6dd4341b1707073b8656f67.pdf
    • https://static.usrfiles.com/ugd/b8c837_cec2a0b50b054a15a341cc5fa677495b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd518353262340a5935270e5658c08b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ef3bf5d474648d9874d6aa759b6362b.pdf
    • https://static.usrfiles.com/ugd/b8c837_56f9e3dc007b4eee92cd0441266ca5ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8706194b2784bffb92f0f6b55bfda2f.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_off000075b9.bin
19b3d2eaa38221663e2802dabbefa062052b2ae55404bde9a08734ead68ddd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 4844 bytes
font_01_sfnt_off0000862f.bin
17f414d6d69ecc4f369e61c42085e5a1419d059e5982a42bbd7c6d1b859cd956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862F 10704 bytes

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