Malicious PDF — malware analysis report

Static analysis result for SHA-256 461182a57f21d260…

MALICIOUS

PDF

72.0 KB Created: 2020-08-31 05:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3daabf4f42c76db5a45a3b8f7de76c SHA-1: 37c301028ebfadeb853857d8567070a2425ec6b8 SHA-256: 461182a57f21d260cb5582199bc3169e3ba07cd387191ecf955388d4767a7e21
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=heir+to+the+empire+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.com/wix?keyword=heir+to+the+empire+pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/bangla_cartoon_jokes_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/56100799855.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/faxakugorolininovitiro.pdf
    • https://cdn.shopify.com/s/files/1/0463/2536/6945/files/wonipapusikekutepuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/63516854568.pdf
    • https://static.usrfiles.com/ugd/ace02d_d048c9f09b104b3fa8231b6162e3a993.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b9fdc66ea114b9685bcfc0fda0482bd.pdf
    • https://static.usrfiles.com/ugd/f1d680_5d8059e8312d4ed294be69c9c0032040.pdf
    • https://static.usrfiles.com/ugd/1b8612_552dc167bfa34527a025965d7337e466.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_off0000df14.bin
427cbc1b735b9f8f9eca617a4cdadaf01ee090cca64e25dd6051a2c39dc958a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 4824 bytes
font_01_sfnt_off0000ef50.bin
84e2a272896c8470e5916d843c6397897f93dc29be6f3044cf265b93bf2798d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 10644 bytes

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