Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e81fba2e5fe7b4…

MALICIOUS

PDF

65.5 KB Created: 2020-08-05 15:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d7778846d6f419cea212c48bf185c7c SHA-1: 95755c1b49c4661aa0e5c649af52594f10cba411 SHA-256: 54e81fba2e5fe7b4b143fb0fe0b1749f8ca93ee83ac228a7b9a06aa3996d56ab
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=athlean+x+program+pdf'. This URL is presented within the document body, suggesting a lure to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, indicating a link farm for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=athlean+x+program+pdf
    • http://files.kidsneedyoga.com/uploads/1/3/1/3/131398085/25798.pdf
    • http://files.ogilvies.scot/uploads/1/3/0/9/130969356/dobipilomobejovaxono.pdf
    • http://files.weddings.themadshutter.com/uploads/1/3/0/7/130775758/ba55ddb49759.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/39623714544.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/ravetebazijejarekiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8027/files/14427529639.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/bigowijimawobetasuzer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/cancer_medular_tiroideo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/tilanatiwolova.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/vosozaja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/55382562581.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/muwutidifemoziruxezibizeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/88049436525.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_off0000c6be.bin
9b970a203b558aa362293ef0cc92329e9c8fa13c37b5e474104a9b18d1ab4313		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BE 5336 bytes
font_01_sfnt_off0000d8bd.bin
86f5547f6bcc49c76dee418d39e97123a97790baceff9a3eb041aa3680b3aabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 9512 bytes

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