Malicious PDF — malware analysis report

Static analysis result for SHA-256 d507eeda797a3285…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 18:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e0e18fae7a94f6ce7bfd30268ae18a7 SHA-1: e7ee9f2a2ef46227caf188628c508e1eb4d8d8b6 SHA-256: d507eeda797a32858c8e2a1e6f4896ca4990e0a0dbf1b782e7cd4ea1acabe201
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link directs to 'ttraff.com', which is known to host malicious content. The document body, though heavily obfuscated, contains the malicious URL and appears to be generated by wkhtmltopdf, suggesting a programmatic approach to creating lure documents. The ML classifier also strongly indicated maliciousness.

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=jvc+kdr330+bluetooth+adapter
    • https://static.usrfiles.com/ugd/b8c837_9acd4a48cc8e4e84a570bd63d510f73d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3362174ac54b418287e1ed31acf5aa4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_477f3ffc5768402d8ab933cb0032aa9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f23c293ec4514393949cf6601bb91e84.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2df443e51294c52aa94d176184f0e2f.pdf
    • https://static.usrfiles.com/ugd/10b11f_18e5a5fe9ed947e7898aa35d35fc85d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3f3980ecb40432683dddd56453d5a04.pdf
    • https://static.usrfiles.com/ugd/b8c837_20129ee27a4044baa80fd4f7fed8f98a.pdf
    • https://static.usrfiles.com/ugd/b8c837_778eadfd0cd3492fad1978ab6ba96529.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a7583e1a184d6381f80099e6a53d5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_565168609c4a4eb0a34f5cbba75d37b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9fa56260e8642398e8df2d7e1b6dc16.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a83b0ded17144df8f748b470081d58e.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e238e609754ece8cb303595b7fac41.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea145fc830984c73b15303f77353c4a6.pdf
    • https://static.usrfiles.com/ugd/a467d2_4b87adc90f764530bbca9e10377c55cb.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_off0000663c.bin
8637f1b9a5e465077da5614ce546dbf2989b83762b322e638d1c76a07b28e758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 5544 bytes
font_01_sfnt_off0000790b.bin
4dd523c47db9a0597df926c958e1e498831c4e43491976001c00f8a963ab2f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 10312 bytes

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