Malicious PDF — malware analysis report

Static analysis result for SHA-256 c812a7430dc0047f…

MALICIOUS

PDF

43.1 KB Created: 2020-08-17 10:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9494a985f73aad093106c090cf6c64d SHA-1: aea34c932ec4f7a16dd517ba78661f07b38be73e SHA-256: c812a7430dc0047fd757976b13330b626740cb4f0639b5b511f78cd9d1b936e3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=bus+simulator+pc
    • http://files.greenmountaingrills.co.uk/uploads/1/3/0/8/130813888/wofozojarobome.pdf
    • http://vasukijo.toricoryphotography.com/uploads/1/3/0/9/130969072/80e3161554b.pdf
    • http://files.wildwellnessllc.com/uploads/1/3/0/7/130776682/xutesoxilebaz_mosadupop_jelokivusefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/12868785937.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/sumogerikulevajuxaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5339/files/wordly_wise_3000_book_8_lesson_17.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/15433837908.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/nusuzeja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/51888911277.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/ashanti_foolish_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/30530670647.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/dinozedolara.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/rumikures.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_off00006b12.bin
2afc93ae5b9c65221d4d9cd78c08b066d210c41a35f7ef7d1ce961e4e412cb34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 5128 bytes
font_01_sfnt_off00007c63.bin
fdf26c6a755669e2c6d26b936cf0b4fd2401a81d109999641a841b3b40ba8fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C63 10620 bytes

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