Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d43aa1a373306bd…

MALICIOUS

PDF

44.6 KB Created: 2020-03-23 04:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3ff1eb1b1da72686e33500cd5342864c SHA-1: fdf0a4ec72aef2c770b6fb854531562831b5789c SHA-256: 9d43aa1a373306bd040be8f50e000a841bf8f92b6615403670f3c7d09df74b1d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents on different domains. The document body text is heavily obfuscated but appears to contain fragments of the URLs. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content through the linked PDFs.

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://chrisbosgraaf.com/uploads/1/3/0/6/130621216/130621216.html#creative+marketing+agency+london
    • http://certifiedemergencyservices.net/uploads/1/3/0/7/130739806/jefawiwuvimamav.pdf
    • http://theleanfigcoachingcompany.com/uploads/1/3/0/9/130969735/xepabagu_bavusofu_xinifa.pdf
    • http://promopeople.ie/uploads/1/3/0/2/130291390/fajokug.pdf
    • http://smartohana.com/uploads/1/3/0/7/130740627/1349355.pdf
    • http://urologiasierra.com/uploads/1/3/0/3/130313082/5993518.pdf
    • http://biblicals.org/uploads/1/3/0/6/130620834/c7379da02f7ba67.pdf
    • http://nononsensecleaning.com/uploads/1/3/0/6/130603841/pumujabepab.pdf
    • http://creativechecklist.com/uploads/1/3/0/2/130274338/xewedawa.pdf
    • http://treatyrockfilm.com/uploads/1/3/0/4/130489958/4705799.pdf
    • http://www.dosdiablos.net/uploads/1/3/0/5/130588599/af1c3.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_off000082c3.bin
7d432418d6d45c61a03412997db5a952fe008a2b2d7b8ca74c6899b4ab0384c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C3 8644 bytes

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