Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5d0976633254ea…

MALICIOUS

PDF

52.4 KB Created: 2020-08-04 22:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42368999d0974efa24a97b76ed7abe3 SHA-1: 08b75379e5fb0c1a271533d74b72343ba08f01d8 SHA-256: 9e5d0976633254ea49095cf691ec2b7c4e572b500f466028b914c45dd8d18a1b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a download for a Java book. It also exhibits characteristics of a PDF link farm, with numerous links pointing to various PDF files hosted on Shopify and other domains. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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.ru/pify?keyword=core+java+black+book+pdf+download
    • http://files.birthandplacentas.com/uploads/1/3/2/7/132712661/2441691.pdf
    • http://files.charlesmuwonge.com/uploads/1/3/1/6/131606546/dipusugurikupes_vabaxatorinuro.pdf
    • http://files.ccc-ct.org/uploads/1/3/1/4/131406390/guroxede_nufavob.pdf
    • http://files.mcfaddenrs.com/uploads/1/3/2/6/132695942/9755081.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/76704554326.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/28521483641.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/loligawapazipawafeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/64064274112.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/5079955380.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6453/files/tidisatexarasuzodug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/koviregelikozixejafojora.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/dosinegobigebuloraxenuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/78701392808.pdf
    • https://cdn.shopify.com/s/files/1/0436/9838/9145/files/xokarafatuvogew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/5941235649.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/78918053207.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_off00008f05.bin
ef9ccc678e269e11607f9b859b0e696df7ef10e4b24631036154168b46163221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F05 5308 bytes
font_01_sfnt_off0000a132.bin
30be188e2e217976c86c14a5715e15ee0bd27861d67cdfd4ce77bd646f60d42a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA132 10328 bytes

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