Malicious PDF — malware analysis report

Static analysis result for SHA-256 cace614cc1a3335b…

MALICIOUS

PDF

54.9 KB Created: 2020-08-31 01:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c354f70b9e867b9de9e895123e5bfe1f SHA-1: 467baac90f54b24f12d91582f400e795d9aff8eb SHA-256: cace614cc1a3335b093784d0af1d14cf3df2dccf81e0640a650e79588221ef9b
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as an episode guide. The ML classifier strongly indicates maliciousness, and the PDF structure includes a mass external link farm, suggesting a phishing or malware distribution attempt. The primary IOC is the malicious redirector URL.

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.cc/wix?keyword=highlander+the+animated+series+episode+guide
    • https://static.usrfiles.com/ugd/cafc24_ea1e92418c09412cba79e6eb9203a29b.pdf
    • https://static.usrfiles.com/ugd/26481d_52cde0ef83c54d4bb93c9015f7f0265f.pdf
    • https://static.usrfiles.com/ugd/c20ea7_8e5b388b14564094817a80894855f3c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_70c277f22ac2468082653bf955e79bc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ac67685347c418a8d01357a5a585f4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3753394d468747edb7bf78b6cae32144.pdf
    • https://static.usrfiles.com/ugd/4dd980_4df59e8070dd4cb0b2d7d5f82644de66.pdf
    • https://static.usrfiles.com/ugd/345929_4aab46f8b126464cb003d6ec0d1f05bb.pdf
    • https://static.usrfiles.com/ugd/cf79db_66d4c555a99345fa8ac3a006cee945d7.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/63102532776.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/velowazezur.pdf
    • https://cdn.shopify.com/s/files/1/0436/6640/7589/files/70508341882.pdf
    • https://cdn.shopify.com/s/files/1/0436/1994/2563/files/fufurekipozovu.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_off00008ca6.bin
0c9c3770ef3c0b2dd777b41296066c7cdf1f619e0b43770bbb3c7d23e075bf7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 5332 bytes
font_01_sfnt_off00009e8f.bin
4585fbab7b9f79f5805df313cd85e8a5edf9fe42e2dd3cc63213c3b5041f42c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8F 15536 bytes

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