Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6055f767c98c1b…

MALICIOUS

PDF

47.5 KB Created: 2020-07-27 08:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea9cfdd9d0699713cb28e95743bb006 SHA-1: 0af4752910de79661d69ecce56aa69052887d8f1 SHA-256: cb6055f767c98c1ba04ff8691484c8847f8becfca57f5a2aea1fbb3fed23d5d7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary URL, 'https://ttraff.cc/pify?keyword=clarkson+go+to+union+station+platform', is identified as a malicious redirector. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to host links. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the final malicious destination or for SEO manipulation.

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/pify?keyword=clarkson+go+to+union+station+platform
    • http://files.elkfordchamber.ca/uploads/1/3/0/8/130874378/zovaregoz-peruzizotujefun-palolirogaz-nisode.pdf
    • http://files.mychildrendevelopment.com/uploads/1/3/1/4/131438692/8989227.pdf
    • http://files.galsinstitute.com/uploads/1/3/1/1/131163635/84eed110ca196de.pdf
    • http://files.mychildrendevelopment
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/dagukerikibizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/47587130607.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/79802215580.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/kapowupogobelepobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3359516262.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinupagudesezubinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/6745777459.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/66392408884.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/63630631070.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_off0000716f.bin
1083ed8cb0faa2ee95118f329a9c86c62452031b2bf17f1df713f3d2f0cc5527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 5072 bytes
font_01_sfnt_off0000829d.bin
e76de2208459f5652ffd891e39547768f4366345b59d9c1d93c8a5e3c9f1dcf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 15012 bytes

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