Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30853ea8f28f070…

MALICIOUS

PDF

45.6 KB Created: 2020-09-03 21:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 610eaeabe0e68750dbc45603bf53ea65 SHA-1: 4a7772093cfe0b8adb8a2b02388b01d348855594 SHA-256: d30853ea8f28f070628eaca8d1259f4de9acc9a2d6c1f9e5c76fe0b7bc6abd55
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links, many hosted on static.usrfiles.com. The document body, though heavily garbled, contains the URL https://ttraff.link/wix?keyword=assainissement+eaux+pluviales+pdf, which is likely the primary malicious payload delivery mechanism. The presence of embedded URLs and the nature of the heuristics suggest a phishing or scam attempt.

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.link/wix?keyword=assainissement+eaux+pluviales+pdf
    • https://static.usrfiles.com/ugd/4117a9_ed53a23a8d8b4290906956da97c3655f.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_db1caefaec1c425c8eb19a645812d21c.pdf
    • https://static.usrfiles.com/ugd/e3c460_2224249bbecb40b2bd10ea7d5852e72e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0065230e734c89bf394a82127e6c96.pdf
    • https://static.usrfiles.com/ugd/41a0b6_33bf37e30745429b8647b98f47cea85f.pdf
    • https://static.usrfiles.com/ugd/50988c_934aba39a866406bb225dd0426300789.pdf
    • https://static.usrfiles.com/ugd/111c46_75ce73d0c03a4290a7f195ae51c42679.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_61af78e9217e425b860930ad2fa8cd42.pdf
    • https://static.usrfiles.com/ugd/79e0dc_4c301939815c426a97d6c0e5c03023df.pdf
    • https://static.usrfiles.com/ugd/e5a943_f269d28c23454c89a2e746b9ac8e48f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1681138beec549f89663bdb1f729f914.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_off000071b5.bin
1fbfe0daa5eef300afa248270b5014fb1f775c82294746e62b97c345c3fdc9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 5208 bytes
font_01_sfnt_off0000836d.bin
1daa52c5c1b261f31c8719c459eb5dc369b6f021fbf7367bd9a23b2a33c816f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836D 12052 bytes

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