Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd1a5031b36c93b…

MALICIOUS

PDF

41.5 KB Created: 2020-09-04 05:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4da066176045f9f2b01608bf38f1d9c SHA-1: 6e5b6bdee1b45c25e3875d542fc871b8cb452c5c SHA-256: bfd1a5031b36c93bb97cf3b6c34482e9faaa8dee7eed54c626f15438f67c82ae
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDFs, a common tactic for SEO poisoning and traffic redirection. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=bugatti+car+race+video'. The document body, though heavily obfuscated, contains this same URL and references to other PDFs, suggesting a lure to drive traffic to malicious infrastructure. No scripts were extracted, limiting the analysis of direct payload execution.

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.cc/wix?keyword=bugatti+car+race+video
    • https://static.usrfiles.com/ugd/b8c837_1cbf32c67fcd438ebdac23d0626f80df.pdf
    • https://static.usrfiles.com/ugd/51c472_236a22dcd98c47c1b87f841b550dd50e.pdf
    • https://static.usrfiles.com/ugd/aa14a9_06d14499f1be4763afc62c420de89998.pdf
    • https://static.usrfiles.com/ugd/4f92c1_7e404223add54f4a82a9ead37ff68855.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/pudaduxozupikixawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/discord_formatting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/naxapalol.pdf
    • https://static.usrfiles.com/ugd/b8c837_9296951c7b1e4dd5b7a1278178d87eb3.pdf
    • https://static.usrfiles.com/ugd/4cf28d_afd5abe9a8e44caa99d705f9afe135bf.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_off0000632e.bin
265fd0f84d7039669f74f3eed6433796b9e6818d5318cc821b774874ea59fb24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5008 bytes
font_01_sfnt_off00007450.bin
c64d282c29f8ad2e9f8767826b1ccb6c08abc426088bf717287e0328fdf5d679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7450 11060 bytes

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