Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8a3d342dc93c9d…

MALICIOUS

PDF

44.3 KB Created: 2020-09-11 05:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01575b4b6c4ac9db09807c2b12bcf30a SHA-1: fec2f5d691c6f50dea168191385cf30243b2448d SHA-256: ee8a3d342dc93c9d2196a823687596ecfec0bf18b7743ff09d5a86ebbcc8daab
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or link farm tactic. The primary malicious URL identified is https://ttraff.ru/wb?keyword=historia%20clinica%20ginecologica%20ejemplo%20pdf. While no scripts were extracted, the sheer volume of embedded links and the ML classification indicate a malicious intent, likely to lure users to compromised or malicious content.

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.ru/wb?keyword=historia%20clinica%20ginecologica%20ejemplo%20pdf
    • http://files.corehandp.com/uploads/1/3/0/7/130738970/nixewediveta.pdf
    • http://files.adachiclinic.org/uploads/1/3/1/3/131379236/vesodamejuwefow.pdf
    • http://bizuvab.katasangkhae.com/uploads/1/3/1/8/131856005/xipajitekijiw.pdf
    • http://ridifir.loveadelyn.com/uploads/1/3/0/9/130969525/5402300.pdf
    • http://files.longsightnursery.co.uk/uploads/1/3/1/1/131163740/tozudumuxudutox.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/2022_tsunami_tamil_dubbed_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0458/0048/9126/files/19606841244.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/evil_dead_tamil_dubbed_hollywood_movie.pdf
    • https://static.usrfiles.com/ugd/7921d2_21d8b84342be47b9823e9fde70c0e903.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bc0d0d172014da7ab1951e5b53d763d.pdf
    • https://static.usrfiles.com/ugd/3826db_93a31d08201546ed86cfa6fc5492742a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a89861ec2d0148a5bc7c1a34fe376d43.pdf
    • https://static.usrfiles.com/ugd/3e9e83_f7e325d040ef47cb98cec34b09917891.pdf
    • https://static.usrfiles.com/ugd/70094d_9e69b79d6af24b6595408dba0a10fd5a.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_off00006b61.bin
d054795f22e83cf0a7f6313ccaf65b8587227b322c699e2f6d9a6502dac3419c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 5512 bytes
font_01_sfnt_off00007e0d.bin
e0c46efa1afbefb3717f4373cb9cbb2b30235c5fe56522fbba625a99a02c5664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0D 11348 bytes

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