Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac199a1250b0f31…

MALICIOUS

PDF

39.2 KB Created: 2020-09-02 08:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec149b8ece574a422ae74568c71423f7 SHA-1: 18ffa8d6a712796888067b5c8cd3572265808778 SHA-256: bac199a1250b0f31ca34169083002fa3acb1a1b54933fb04e0145c837f6e48dc
162 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a PDF link farm. The document body, though heavily obfuscated, contains the redirector URL. The presence of a password archive lure heuristic suggests the PDF is part of a multi-stage attack, likely to bypass gateway security by requiring a password to access further malicious content.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=ninja+valentine+song+ringtone
    • https://static.usrfiles.com/ugd/3e9e83_d754349d69794b859c2be44f45245607.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb1e6880f2654da2884085ebdeb17af9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d7af03a04d145f7a49d1f0b9cdc5789.pdf
    • https://static.usrfiles.com/ugd/b8c837_77221a66c268461892ee2ec5bfdc527b.pdf
    • https://static.usrfiles.com/ugd/47b1e8_b684efac88b0413ca371260dd69768ca.pdf
    • https://static.usrfiles.com/ugd/0582e0_c82f1a9d683646f7a2a9de644b2b628e.pdf
    • https://static.usrfiles.com/ugd/55f640_edf09c9a1a124de6bc1426852541d7b6.pdf
    • https://static.usrfiles.com/ugd/d78803_376a90b0a1f340eb81f59027cec455a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_473943440a764100b3342c0fbc9bb6af.pdf
    • https://static.usrfiles.com/ugd/4f270c_88c1c57b37b64c24b6af7e4259cbb1d5.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_off00005d0e.bin
ff47a9c7540f06ad8e79ff10e6d41941374ff784e6daff9d111d488f6f6d82ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0E 4956 bytes
font_01_sfnt_off00006e0a.bin
4d5c3cad92ea52dc5c71d51f3b303ac18912fa76b7ff0a1803f5aba6e1f62353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0A 10024 bytes

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