Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fd752b46a59292…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 01:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07283e8591379774aa69a5518579da33 SHA-1: 284fd2629cba24d7af153c28b44e1fd0913b6809 SHA-256: f4fd752b46a5929289e34a9468693e2cb4d893843f6a175de556551e74784d57
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body text, though heavily obfuscated, contains keywords related to book downloads and the malicious URL. The primary heuristic indicates a malicious redirector, and the ML classifier strongly supports this finding. No scripts were extracted, but the presence of multiple embedded URLs suggests a delivery mechanism for further malicious content.

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=beautiful+creatures+book+download+pdf
    • http://kojilat.abchase.co/uploads/1/3/0/7/130738799/4738894.pdf
    • http://files.winchesterkycofc.org/uploads/1/3/1/4/131407890/3669441.pdf
    • http://files.thirdcoastdiscs.com/uploads/1/3/1/0/131070674/fivopusaximowow.pdf
    • http://files.dougjohnsonpiano.com/uploads/1/3/0/8/130874278/kixusirapujurox_wedewenutimafum_lusukug_xeponofinipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/86603290675.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/60119992711.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/derilepoxiginovojuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/jeffrey_archer_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/beclomethasone_inhaler_davis.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/crenated_tongue.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/53585998505.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/5701783684.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/marriage_certificate_application_form_telangana.pdf
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/dozazijigibimokupo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/8214626479.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_off00006396.bin
ed78dc2f561184b40ee5c8fe1583d7c9eb3470ac333d194c83452551a2d7144d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6396 5492 bytes
font_01_sfnt_off00007668.bin
62bbdd906ebf3483ee885ba7b886b7ff9dce4559dfcc736c9ca3c3df5f04e73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 9764 bytes

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