Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbcb1da916ad8f2…

MALICIOUS

PDF

37.1 KB Created: 2020-08-29 15:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d61b2eb3fb5eb346686699649a4a63d SHA-1: 59f75357088ac78ef65946f0e1f5f8bb5ea2dc80 SHA-256: 9cbcb1da916ad8f20fb75623f4b286d943d631807b3e54e4635163c807ead0bd
150 Risk Score

Malware Insights

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

The PDF file contains a deceptive document body and numerous embedded links. One prominent URL, 'https://ttraff.club/wix?keyword=chaturbate+token+tool+verification+key', is flagged as a malicious redirector. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, suggests a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=chaturbate+token+tool+verification+key
    • https://static.usrfiles.com/ugd/b8c837_9f30953cf83342c593576e1d37ab3c74.pdf
    • https://static.usrfiles.com/ugd/b8c837_44c12939e27449dca1e76783b80fd58e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a38c410f2a1421f89fc2e4e7703d5b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0db4528d84004a4e87e8fae2cc399191.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b7e6ba1dcd4a3a8e9da07b81913988.pdf
    • https://static.usrfiles.com/ugd/b8c837_0536c9bc57ad472bbb5a5fa32ff314f3.pdf
    • https://static.usrfiles.com/ugd/ea2f88_caa8ef14883f47baa8e73297c36d47f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2403ad843d34fb4a8f57371a1049df1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/kagazimeroruzijijegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/63094243576.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/futilonulujemutegikoguv.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_off000052cd.bin
e6e50927ff3b18ebcd86d4085a66fa03578c8457b106139b9d9a3fa829feacbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52CD 5060 bytes
font_01_sfnt_off00006410.bin
d72533b8305ecd028f12f1e9bd93364c13001616666004d91410df82c3953305		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6410 10524 bytes

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