Malicious PDF — malware analysis report

Static analysis result for SHA-256 5393f13bfb01d2e5…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 01:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ad30fc4b10d3aac626a050b191ebaa SHA-1: 812a01064a2025dcfeacf58ecbd69d0f67fce16c SHA-256: 5393f13bfb01d2e5509f1487284e18733d371c31a0439bd0dff8947a1c52f3ca
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.com/pify?keyword=frizuri+barbati+in+functie+de+forma+fetei', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to shopify.com, likely to manipulate search engine results. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=frizuri+barbati+in+functie+de+forma+fetei
    • http://xonixemaw.marksmotivation.org/uploads/1/3/2/8/132814718/38a6313e06.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/fadibibeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/95007313911.pdf
    • https://cdn.shopify.com/s/files/1/0462/1448/0026/files/format_json_vscode_shortcut.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8764/files/cationic_surfactants.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/bunny_girl_senpai_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0440/7309/1222/files/all_information_about_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/fozafuxaziposelarux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/pisemotutukupupilatej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/geometric_construction_notes_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5573/files/cellular_respiration_activity_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/small_engine_repair_manual.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_off00005bdb.bin
a8ad281d012c60e9a3bafb89b194eb5a2cd2fdecced394e959c2b9bd0cc940d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDB 4984 bytes
font_01_sfnt_off00006caf.bin
917f5c65458be04f47741c0ade5c6f1ab1bbf6ea636ff4f6b4f0ffd91a741d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAF 10360 bytes
font_02_sfnt_off00008d91.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D91 4324 bytes

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