Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc088a3ac63035e…

MALICIOUS

PDF

34.7 KB Created: 2020-11-06 18:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7905282ab52bd21338a3bb24d61428ea SHA-1: 30876ee570140ff36f698c9a485544499f14129a SHA-256: 4bc088a3ac63035e8b280ea6d3e14ba51ea06e69b33fdf09bd2de310bffc5cc2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a PDF link farm and a malicious redirector, suggesting the document's primary purpose is to direct users to potentially harmful external sites. While no scripts were extracted, the presence of embedded URLs and the PDF structure strongly suggest a malicious intent to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ggtraff.ru/aws?keyword=simplex+2001+manual
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f9f6d673e76f.pdf
    • https://bimelubisazabe.weebly.com/uploads/1/3/4/4/134492892/sivawivalep-pipetakawixe.pdf
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f8b0479eb902.pdf
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/gumililov_fowij_lizonezokal.pdf
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/vopetasubaz.pdf
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f909f808c9f5.pdf
    • https://xevujudibibabus.weebly.com/uploads/1/3/4/5/134599482/4205a0d6924.pdf
    • https://widobane.weebly.com/uploads/1/3/4/3/134340358/34327.pdf
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/xomefaxafojudo.pdf
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f95803a55032.pdf
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/dumirisefamul.pdf
    • https://cdn-cms.f-static.net/uploads/4445326/normal_5f9f802b75038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/63fbed6f-d888-4b41-9599-9d951a9417c0/34160354947.pdf
    • https://uploads.strikinglycdn.com/files/047b3ce7-8ef8-409d-b7f5-b85962ec175f/93099997921.pdf
    • https://uploads.strikinglycdn.com/files/742ec78e-5ac9-4e54-a13d-9572e5aa3b96/36533045669.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000612d.bin
1d796f7feb82f9a7dd69729c0884bdf8783f7f19f46ef5c38460c3fc30da6c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612D 5188 bytes

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