Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21556ffa3519f4f…

MALICIOUS

PDF

37.3 KB Created: 2020-08-17 03:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af220dc664d67c063869e13aaf48552b SHA-1: 01994df59dd3ef51ec2877d9dc305c711f354fb4 SHA-256: e21556ffa3519f4f3c34ca7c4da4c23de4384e3e974ef7497c1637e8adf4670f
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is designed to lure users with search engine optimized content. The document also functions as a link farm, embedding numerous external PDF links, many hosted on Shopify, likely to manipulate search engine results and distribute malicious content. No scripts were extracted, but the presence of a critical PDF redirector heuristic and a high ML score indicates malicious intent.

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.com/pify?keyword=chevaliers+de+sangreal+piano+sheet+music
    • http://files.caribbeanwesleyan.org/uploads/1/3/0/7/130775220/8242444.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/97185002126.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/pusurezixetovuzugitutaxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/1864101081.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/wefakekamiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/68409999432.pdf
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/the_addictive_personality_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/35318671135.pdf
    • https://cdn.shopify.com/s/files/1/0440/2819/9062/files/vokafoxozije.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/jekurisusog.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/circuit_court_of_cook_county_online_forms.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_off00005492.bin
90dd55e380ab33713831bab9c7264568ba66507267bab812a5216d839942b169		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5492 5452 bytes
font_01_sfnt_off000066f9.bin
66edbe1fbec92917928f8bf33999ef33e52c0daf7030c5d969222c95abf07660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F9 9920 bytes

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