Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1e7ecd8bfd735c…

MALICIOUS

PDF

49.7 KB Created: 2020-08-30 01:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0726529f1d947527b20f98c591164e3d SHA-1: 0136c1da8cf760329078dd5faf45b2ea668b4b35 SHA-256: 9f1e7ecd8bfd735c303927db2547e54e1bf05735ec3a080eaabcc0949a913044
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=miscrits+world+of+creatures+not+working'. This URL is likely used to redirect the user to a malicious site for phishing or malware delivery. The document also contains a large number of embedded links, many of which point to 'static.usrfiles.com', suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier also flagged this PDF with high confidence.

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.cc/wix?keyword=miscrits+world+of+creatures+not+working
    • https://static.usrfiles.com/ugd/b8c837_30056e437fd1469fbae2fce42a83bbb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd09ff8b39dc45ffbba8d63e1564af44.pdf
    • https://static.usrfiles.com/ugd/b8c837_7164653375814b81ac3ed7067aff12c3.pdf
    • https://static.usrfiles.com/ugd/77941b_806a482f88e2422fb90bbb305b259a78.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8353d9a4b014656bbdf633219a8d520.pdf
    • https://static.usrfiles.com/ugd/b8c837_52f3afe6cc2a4343b50c8456402e07f7.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_71dc8c6d458343cb85cb1f7dd292ae01.pdf
    • https://static.usrfiles.com/ugd/b8c837_b47872eb1fc74acd89e7d333ae2f581c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e457ef8d9ca54f368d538eec07eb97c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_275cda56b0994275b542f2aee5bec5c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9585a4372f034e088ff4e54519a577d5.pdf
    • https://static.usrfiles.com/ugd/8cbfce_d5e4a5bf210445d18de95cabd7b2dcec.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e80.bin
9c267c5c4bd85fdf0838acc63b621529c2075e2d8e4b73e968d2ef8658752bcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E80 5352 bytes
font_01_sfnt_off000080da.bin
b968869f6188bac30ffa403926c308d84fc66f1af0ea7a1e5fa815d9b5081972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DA 10192 bytes
font_02_sfnt_off0000a3ed.bin
4bf7462e787791ee30cced4e4a0065977ba460b587ec5e4d0bf31a1282398818		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3ED 16416 bytes

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