Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc2448cc4f23c04…

MALICIOUS

PDF

39.2 KB Created: 2020-08-06 17:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017b5b1dd6c8db89a8d58ab4c2e005c8 SHA-1: 6c79867dc7b975baef7bc4e1b023ce0fa24b92ae SHA-256: ccc2448cc4f23c043f8c6d9e461070a9faa403e228fb7dec9bf05fb634baec02
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=reading+skills+pdf+file'. This URL is likely used to lure the user into downloading further malicious content. The document body also contains this URL and numerous other links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to improve search engine ranking for malicious content. The ML classifier also 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.cc/pify?keyword=reading+skills+pdf+file
    • http://files.luciwhite.com/uploads/1/3/0/9/130969761/kobamu_nojoxuv_vagonaboge_tamogebeti.pdf
    • http://nofotuwul.tubuloids.com/uploads/1/3/0/8/130873851/d4f7d8.pdf
    • http://files.rippintimber.com/uploads/1/3/2/6/132681294/tivulejetidafikedam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/gk_power_capsule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0058/files/livevejugoviradanuvuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/14589032354.pdf
    • https://cdn.shopify.com/s/files/1/0433/1805/0984/files/36840574716.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/51701285175.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/parliamentary_system_of_uk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/puxuxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/77819609985.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_off00005c6f.bin
9d277822655387772d027b058fa5b1c80c0fc59d7a56f03acf19532e92d0677b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6F 5184 bytes
font_01_sfnt_off00006e3c.bin
9ad7d489cdd1ee5d7ff4f1110a3a1b4b3e0d62f6c29b93913bfc94367118d734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 10012 bytes

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