Malicious PDF — malware analysis report

Static analysis result for SHA-256 7319bedecbe38f47…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 03:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af30ed34f8a952a1b74723e3f5a6529a SHA-1: ad5c0d11186e63bb51af2eadf271af80b6659fa1 SHA-256: 7319bedecbe38f47fc831fbb1188be6bdfa69c5f0fc3c54db036fc78f0d4e9ec
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to driver's license tests, suggesting a lure. The PDF also contains a large number of embedded links to 'static.usrfiles.com', indicating a link farm, likely for SEO poisoning to increase the visibility of the malicious redirector. No scripts were extracted, but the presence of malicious links and the lure content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=driver+license+ny+test+questions+and+answers
    • https://static.usrfiles.com/ugd/b8c837_005db2c788d544fda7811eb071a3540d.pdf
    • https://static.usrfiles.com/ugd/b8c837_17f3278c38ea432f9b2b6b4c24efe6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e04bb1d1195e4d4fab22b1ded5a0f9f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_19bfb46481044c82a298a391a29cc5bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a745e7b5bce49218425f295abe35c3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd55ff76e2d7412887c5dc4db07dd133.pdf
    • https://static.usrfiles.com/ugd/b8c837_23b63cce26374534be4d53628a15a292.pdf
    • https://static.usrfiles.com/ugd/b8c837_b72b27a34f524b0f8a4beff5cfb824de.pdf
    • https://static.usrfiles.com/ugd/b8c837_8afa378f9c414a4cad1c4fd2df8203d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_72585d0f5c2d426cb60db3f11749c746.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c5f36120034c78a994adac33fb97bf.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_off000066e5.bin
4e77432afa0f1475bd28f1902a3b1d5b10599c24e3fd6daf41c3a04f6d3b8a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E5 5312 bytes
font_01_sfnt_off0000791d.bin
8e23fec043eb3246db75303e264fce9bf2e1d87233c8a5482c46f83e862db04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791D 10312 bytes

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