Malicious PDF — malware analysis report

Static analysis result for SHA-256 261d009cff977006…

MALICIOUS

PDF

53.7 KB Created: 2020-08-29 13:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab81fada33cb6b44bb7e2fabcd97b267 SHA-1: 477a0d47c65ea9710808a239003d4cdadf6980b2 SHA-256: 261d009cff9770064e9ffa5116abd21da52c7f9b812af90d7f8b7a705b6cfca4
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to lure users to a potentially harmful website. The presence of numerous other embedded links, many pointing to 'static.usrfiles.com', suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, but the primary malicious function appears to be redirection.

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=empereur+l%2527empire+du+milieu+iso
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.pdf
    • https://static.usrfiles.com/ugd/b8c837_60a2b0324e5e4562ad4f5ea1b57b51ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2b5be5806754aacad2d3be32957814a.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/nafizowagutonuwemujenokim.pdf
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/apollo_tyres_annual_report_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/35007676225.pdf
    • https://static.usrfiles.com/ugd/b8c837_b08ff53c2f6d423aa3e356dd50584849.pdf
    • https://static.usrfiles.com/ugd/b8c837_a817384f4a3c4bf39c1c9ee3421b6721.pdf
    • https://static.usrfiles.com/ugd/b8c837_a23d302d84f44745abc39ae295659b60.pdf
    • https://static.usrfiles.com/ugd/b8c837_38797651f90b4dfa9a9e69d79ca633b8.pdf
    • https://static.usrfiles.com/ugd/65b209_4d33e5af0edf4fd88c243c29e23c0494.pdf
    • https://static.usrfiles.com/ugd/b8c837_a38d6fa4cb47484080ed3b800154c22e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2db59139b67d466e9a131c6c50176046.pdf
    • https://static.usrfiles.com/ugd/b8c837_f679f1acf09d43329bd606e0487b004e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5acfa20dbf0a4622be5e3a79c0f3c604.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000703d.bin
f1b3c1415a866be18eff0f69b03dec3f05c06d00deb4b76abeb7765044a0cc65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703D 4584 bytes
font_01_sfnt_off00007fbf.bin
74b1083aee062fa1b6583da8884c1b0e13dfbcbdaede226614c8ea08b57e6fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBF 1832 bytes
font_02_sfnt_off0000888c.bin
44ae7b4f1bf916e4ebd3bbe6bc8999b2dd99e63891a3c5d9c9cbdac96ba97cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x888C 17300 bytes
font_03_sfnt_off0000bb17.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB17 4324 bytes

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