Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac2ff100e751aa7…

MALICIOUS

PDF

67.9 KB Created: 2020-08-31 04:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2403dc08961de9198931621d35e1f38 SHA-1: 9c464f9eccace872f534c256b2bd215e413fcd97 SHA-256: dac2ff100e751aa73e311afb9707f908093569bc0bb9e0b63491be8e0f77328e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a software download for 'Vegas movie studio 14 platinum'. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link.

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.com/wix?keyword=vegas+movie+studio+14+platinum
    • https://static.usrfiles.com/ugd/b80405_4f20023736c1471e8e0f6313935660ba.pdf
    • https://static.usrfiles.com/ugd/bd5c68_db26c11761b444608d8ba98cd2b4377d.pdf
    • https://static.usrfiles.com/ugd/b8c837_113ebf78a3324752a355d55de411a222.pdf
    • https://static.usrfiles.com/ugd/b8c837_3457e671e6fb4533951ef01701bff528.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4438fe6359b4f5e82817bf1acb6140d.pdf
    • https://static.usrfiles.com/ugd/384ea4_d8f04e8bd9454fd1bb5c0dcc61e2c317.pdf
    • https://static.usrfiles.com/ugd/b4a829_ef2558e8d94e48c79740ca0b69e1e1e5.pdf
    • https://static.usrfiles.com/ugd/384ea4_9bdf95a7f6734d6bba2d34db9a0e8ae5.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_f99af7a3dda64d869f7b35cecc5f2057.pdf
    • https://static.usrfiles.com/ugd/a2d007_e554d5faa8c24fbeb7a0ab3acac3536f.pdf
    • https://static.usrfiles.com/ugd/b8c837_502f1399816e44929536504239af61e2.pdf
    • https://static.usrfiles.com/ugd/5af86b_0f928482f5d64229964d88e3d6197f05.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_off0000ca1a.bin
f38a19e94520d2ec38fcfcf356156360b88d58811f554f427ee46e48b8b91ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1A 5348 bytes
font_01_sfnt_off0000dc57.bin
d56a87cbb4462e17e5de7a7efc413bb6cd7ced6e0dff57e4d1483b2604ecf222		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC57 10756 bytes

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