Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1dca0689f2a8b66…

MALICIOUS

PDF

55.0 KB Created: 2020-08-30 13:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9cd9a29ed8ec558db0a44ac04754a4 SHA-1: 67497d9721d12103390b08e9a4252f6c7e15e6ad SHA-256: c1dca0689f2a8b669fbaee065f75fa0779e68b51e0972f592b36d1f676a17ec2
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 'https://ttraff.ru/wix?keyword=nitel+ara%2525C5%25259Ft%2525C4%2525B1rma+y%2525C3%2525B6ntemleri+nelerdir'. This URL is embedded within the document body, suggesting a lure to trick users into visiting a potentially harmful site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. 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.ru/wix?keyword=nitel+ara%2525C5%25259Ft%2525C4%2525B1rma+y%2525C3%2525B6ntemleri+nelerdir
    • https://static.usrfiles.com/ugd/804ff6_4d562d8914784726b2aae1a74afb240d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c93cdf559994137aac924232026cf28.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b6c745be44b4880b4906a0e94e2621d.pdf
    • https://static.usrfiles.com/ugd/10b11f_c24b4785130f49a4a9d4ff5ee12ca5b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_00746bb3e7cd49f19d7059be2d01271d.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/81816175416.pdf
    • https://static.usrfiles.com/ugd/696b8a_a116c240a5544621916d3cd17659d5db.pdf
    • https://static.usrfiles.com/ugd/89c6ad_80c3f84353d24dffa09a8e980b6c2152.pdf
    • https://static.usrfiles.com/ugd/a1fb72_517eb8dc37054cb2820433f236d6dd39.pdf
    • https://static.usrfiles.com/ugd/b8c837_10d67812611b4847826248b5193855b4.pdf
    • https://static.usrfiles.com/ugd/12dc78_feea20366ac04d7687999400119029ab.pdf
    • https://static.usrfiles.com/ugd/628a76_9fb75c4d7e7041128632c51e4d30dbfd.pdf
    • https://static.usrfiles.com/ugd/8b9728_2cc3f92fcd1c48eaaef751bebb52a220.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/
    • https://static.usrfiles.com/ugd/b8c8

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009765.bin
1da1dfe8d040f1e954f2da0fc97bb61b4b49d82305064b3e3d506312ae22b575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9765 5280 bytes
font_01_sfnt_off0000a906.bin
394a60b51988e1c791f8463464b9c50cabe386bd89f9b48405be64adb0efcb9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA906 10708 bytes

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