Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fce6aa8b4394b08…

MALICIOUS

PDF

45.6 KB Created: 2020-09-08 01:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cfb85683731967c58374fecd20daba8 SHA-1: d10c5621ebf278ada8203817164709a6f99b4b22 SHA-256: 7fce6aa8b4394b08e79f75da5e824fc7146f81ef6a5f0fbba9a0f51560552ab0
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to PDF files hosted on static.usrfiles.com. One critical heuristic identified a PDF redirector link to 'https://ttraff.club/wix?keyword=kuwait+weather+report+hourly', indicating a likely phishing or malware delivery attempt. The document body contains garbled text but includes the same lure as the redirector URL. No scripts were extracted from this sample.

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.club/wix?keyword=kuwait+weather+report+hourly
    • https://static.usrfiles.com/ugd/4b874d_2f98bfe31762453e87c15fb229144f59.pdf
    • https://static.usrfiles.com/ugd/39cb9d_9b1a112e46ec4e1398c5bfb3f5b35b71.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc565d8a5fe4862abe0ccba70beb78f.pdf
    • https://static.usrfiles.com/ugd/98d639_72ee038817bb4ea7af886ea1f26289ec.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_044739966bad465fb996ad85cb1e0034.pdf
    • https://static.usrfiles.com/ugd/b5aed9_2e995f7c37cf4474bb7a6c99412bcd06.pdf
    • https://static.usrfiles.com/ugd/46429b_93c90ad0d9c042938622530e09641c96.pdf
    • https://static.usrfiles.com/ugd/a72fa8_ad7eba6a625e482396485bf5a04ffe4c.pdf
    • https://static.usrfiles.com/ugd/485053_99f7564b1ead4da59fdf92fef06204cf.pdf
    • https://static.usrfiles.com/ugd/3826db_fa90d4fc3e7b49038fc9d431208f52c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9cfdad9411f46a3af873fc3decc710c.pdf
    • https://static.usrfiles.com/ugd/b8c837_38b229dc1e31431aaf3ada771b33d3cc.pdf
    • https://static.usrfiles.com/ugd/b148e5_2d86c44fe21e4acfa22d113630809c89.pdf
    • https://static.usrfiles.com/ugd/c34aa9_42650f56887d4b0d8401664a49a3da8e.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_off0000681c.bin
143125d78f785e791d9c21072299e9de1b1c3447b33a8b5f2aa841645b43710f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681C 4668 bytes
font_01_sfnt_off00007826.bin
9df6ae3dba935e1a2f4744a27d6c3d443207afd7266538cbff57b3b26948f3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7826 10336 bytes
font_02_sfnt_off00009b7e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7E 4324 bytes

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