Malicious PDF — malware analysis report

Static analysis result for SHA-256 9127284087d9bf72…

MALICIOUS

PDF

39.2 KB Created: 2020-09-03 10:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc763eacd1174430d97534ced3c2401 SHA-1: 78f94b09df377ea2f9bcb543f4e8bc4dee40574c SHA-256: 9127284087d9bf7234d1504ef7ab23f573dbf0216fb46b5f0f827d6fdc417526
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is the primary attack vector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous other links to static.usrfiles.com suggests a link farm used for SEO poisoning to lure victims.

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.me/wix?keyword=pro+forma+profit+and+loss+template
    • https://static.usrfiles.com/ugd/3e0cb9_37a90be0409941c6bf4cfdeed53e7947.pdf
    • https://static.usrfiles.com/ugd/0d018b_85cd5f5d8db249319646e8e0e6ba7686.pdf
    • https://static.usrfiles.com/ugd/b8c837_3be6d8a7088b43f1914a2bec883e7a1c.pdf
    • https://static.usrfiles.com/ugd/c1615c_e7d67452b0564098a116f7fc863a716e.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_088faf9016c04a5691ac340ed89528fb.pdf
    • https://static.usrfiles.com/ugd/63f22d_3a1487c8c9c64d77a191b486bef5b5e1.pdf
    • https://static.usrfiles.com/ugd/03ae60_0aa9d66a1edf42ee997382d82a647639.pdf
    • https://static.usrfiles.com/ugd/e23fbb_1acfd570915445dc82e27966bf6a673f.pdf
    • https://static.usrfiles.com/ugd/38eac1_4ffe4f51fb0d4ccc8978c8a927eab118.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4116cbfc5b2404e88eeecc4fc0422ce.pdf
    • https://static.usrfiles.com/ugd/09273f_362f5a57e3c64e96a58ca5ed71fba1b9.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_off00005b6b.bin
bdd9fa9db4d3ff8d73e3757a7800a917ac72e64c94fab4d35cf0fb8e7fcc7b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 5188 bytes
font_01_sfnt_off00006cf9.bin
f4d3e66a17c2e91693089a200addb9ba0bd4b258ff3ef64c513e23287caf8e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF9 10348 bytes

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