Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c32e307af57d9b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 10:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6693da7d24602411bb90e07071c07e3b SHA-1: 22dc14aef5df81b810535f8e455a2d1bfb9cfbc8 SHA-256: 50c32e307af57d9b3671f7c0055d77f0d61e557b0eeb6b435afdb521095234a9
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised with the text 'Exercice chaine de cote'. This indicates a phishing or social engineering attempt to direct the user to malicious infrastructure. The file also contains a large number of embedded links to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the payload.

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=exercice+chaine+de+cote
    • https://static.usrfiles.com/ugd/badafb_9b425328456b45aebdf2ec92f9c24855.pdf
    • https://static.usrfiles.com/ugd/73cb9e_838f82aaaded46149ba82077c605707c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b04b151de58545ecbe6dbab3f5d30991.pdf
    • https://static.usrfiles.com/ugd/98857b_2ea83a5b926845de879956938bc638b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_25ce794ea87541828f2e8ce8877a5f8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dec77c6d46b470ea3f56922e1c7dda0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4888ca9a04c847228ff20eebe8ea2965.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_7ae1a17052c74395a417ac6f563d7048.pdf
    • https://static.usrfiles.com/ugd/b8c837_9103ccc0c81647c68040e4b2ae5c9f27.pdf
    • https://static.usrfiles.com/ugd/6cf392_cfb20df5bfd2441ab626050de100a8ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2298079133140999817f0eb7840f75a.pdf
    • https://static.usrfiles.com/ugd/b8c837_15c70d4e9a1b47b89c0e63ab50b0c4fa.pdf
    • https://static.usrfiles.com/ugd/8de238_9d4ae883e2204e8fa8737129ea4d4df4.pdf
    • https://static.usrfiles.com/ugd/eb6612_611d4f0c7e6049a0beabc13320f490ff.pdf
    • https://static.usrfiles.com/ugd/24853a_441e6fb703974d329ed699c1531dbdaa.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_off000061be.bin
a7f1b9374ebf53d0543a26f575597d038f594e37cbd93984ef0d081d92263460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BE 4844 bytes
font_01_sfnt_off00007226.bin
993c6d5e086b9d65d680336aa5fb7a82317c9421f4082a3cbda76914c34fef48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 11920 bytes

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