Malicious PDF — malware analysis report

Static analysis result for SHA-256 23aa251443026e1a…

MALICIOUS

PDF

37.0 KB Created: 2020-07-08 12:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66ecfd35ed5c96b9f01859406d888288 SHA-1: 49c3f879ea1c99cbe31203e2f312f74ee32244dc SHA-256: 23aa251443026e1ae4c0e48808b93c2cb1e9be35ea731a333a9bb159d3c3ea62
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated but contains references to the same URLs. The primary purpose appears to be SEO manipulation or distributing malicious content through a link farm.

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/wb?keyword=the%20speckled%20band%20questions%20pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://files.livinggodsmission.com/uploads/1/3/0/8/130874413/femobupowufebekoluta.pdf
    • http://files.thedinopark.com/uploads/1/3/2/7/132740415/6535022.pdf
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.pdf
    • http://files.istudentsduke.org/uploads/1/3/1/0/131070379/5a5bb0284ee.pdf
    • https://dukidowa.files.wordpress.com/2020/06/parakux.pdf
    • https://pabozopa.files.wordpress.com/2020/07/subulebejimoba.pdf
    • https://xarinigeted.files.wordpress.com/2020/07/27925692184.pdf
    • https://tedinunimo.files.wordpress.com/2020/06/41837940201.pdf
    • https://julaxotetelu73207895.files.wordpress.com/2020/06/dulujalawutejalef.pdf
    • https://ponadewez618744445.files.wordpress.com/2020/06/kajuwamuri.pdf
    • https://vajelasidoxo.files.wordpress.com/2020/07/fusizuginanikutuzovumadi.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_off00005397.bin
1e6677a11275d5a1f8e36fd1d8dedc267e8f549da81852a0a7310b5b798c2e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5397 5308 bytes
font_01_sfnt_off00006592.bin
03dfd6f3cf718e4780617ed8735901c651b3437691b97460e6a16815aac39467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 9900 bytes

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