Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0bb4c5d42a4c88…

MALICIOUS

PDF

43.1 KB Created: 2020-08-01 14:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d594de526206cd7fa6ed61b5a783a6 SHA-1: e2677d54ce11f8d635c79bf1b895fff700a07eee SHA-256: fa0bb4c5d42a4c8803f943e363dccfd42512d193b1ba9664d189d57fcdabc713
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic firing identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=pioneer+sp-+pk52fs'. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious redirector URL and several Shopify URLs.

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=pioneer+sp-+pk52fs
    • http://files.pruddlb.com/uploads/1/3/0/9/130969633/8558884.pdf
    • http://files.recapinc.net/uploads/1/3/1/4/131406717/pepezoxof.pdf
    • http://files.51ststreetchicago.com/uploads/1/3/0/9/130969306/sakoruzowepemeroma.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/juwipirilobuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/32802104380.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/13417751769.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/5517300968.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/xaluriv.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/marudiboxumoxat.pdf
    • https://cdn.shopify.com/s/files/1/0435/6738/2687/files/rekatazabinulixobofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/lixatovegid.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_off00006a6c.bin
682d96acec1a75c4025806c6b89306b8f6ddd11bdb1885fe6fb2fdf1afb621cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6C 5008 bytes
font_01_sfnt_off00007b9f.bin
1a636b5151c94330e216f347dfcf2ca03fa516ef05c295c56ba842a94bf59014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9F 10616 bytes

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