Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0803a569b4777a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 18:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a86a64a6450b64a7111269e00219f260 SHA-1: 33e286d6396170fff4d567acf974dca3ec4a2d5d SHA-256: ba0803a569b4777a5dc0088dff69d9f19e56400885c0a0b0c2847eb518a99693
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.com/wix?keyword=i+know+that+my+redeemer+lives+sheet+music+piano+solo', is flagged as pointing to known malicious redirector infrastructure. 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=i+know+that+my+redeemer+lives+sheet+music+piano+solo
    • https://static.usrfiles.com/ugd/374ce0_7d6dedf86b6e4d8a98e32288e725a8f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c40bed4106164791b4c1f9a8b5d2d4de.pdf
    • https://static.usrfiles.com/ugd/b8c837_de59b9b9172143acbfdfeff1c89cfc96.pdf
    • https://static.usrfiles.com/ugd/bae363_3db168a32b8e491b8757348006784ccf.pdf
    • https://static.usrfiles.com/ugd/e2c250_0ee1151c295c4b8e9f073fcb7a12ced3.pdf
    • https://static.usrfiles.com/ugd/5ed537_38d61798f7cb4e999277d47798585e8f.pdf
    • https://static.usrfiles.com/ugd/c836c3_1c26b66eed0e4f4a8ce360daad2512ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ce9fba7b8f487da62bb35dc16ce0a2.pdf
    • https://static.usrfiles.com/ugd/a18aa6_0056bccc734f4a28b558d746ea95d17c.pdf
    • https://static.usrfiles.com/ugd/2ac701_8326ce7ebd6c4861bbafb2f16a20c765.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_off0000553e.bin
e6ee03a6fa01dfb1f768bc646c075cd3d1d58f594301268f9d8fb855747c6a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x553E 5568 bytes
font_01_sfnt_off00006817.bin
670e53ddfcd6db104f4c56e2ae13ffc2acf58e1d15d631e7f503d714c2bdef14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 14868 bytes

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