Malicious PDF — malware analysis report

Static analysis result for SHA-256 f450a507a81fc35f…

MALICIOUS

PDF

26.7 KB Created: 2020-05-27 19:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cd34d0f917b9a88f5d64a176ff4776c SHA-1: 4749295ce804df37252059616427f6b8ff80bb37 SHA-256: f450a507a81fc35f6f288e13497539746dc70ea635ddc1550f241b43354b045a
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO poisoning technique, designed to drive traffic to malicious content. The presence of multiple PDF files in the URLs suggests a redirection chain. No scripts were extracted, limiting the ability to determine the exact payload.

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://ciggysound.com/uploads/1/3/1/1/131164312/131164312.html#10.+s%25C4%25B1n%25C4%25B1f+matematik
    • http://signetronson.com/uploads/1/3/1/6/131606305/b705f01e5804.pdf
    • http://hostmaster.grahamsims.net/uploads/1/3/1/3/131380305/8eb5376ed8d.pdf
    • http://logcrafts1942.com/uploads/1/3/1/3/131398220/1197456.pdf
    • http://journeyhealthwellness.com/uploads/1/3/0/3/130313102/4229229.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003edb.bin
98f5b99f7399c17153a5316e4014e30f9a8257885f4c5cb8649198305d8dca9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EDB 10072 bytes

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