Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5d4eb992c123b6…

MALICIOUS

PDF

39.7 KB Created: 2020-07-29 08:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f87ce42b3e3b92e8bd9e460020853975 SHA-1: adb31123069a00dfbfbf1fa602d6252f77bafc0d SHA-256: df5d4eb992c123b6bceb8ee9409c1404361884313a957fa3f107e288aac7f284
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 'ttraff.ru'. This URL is likely used to lure victims into a phishing or malware distribution scheme. The PDF also contains a large number of embedded links, many hosted on Shopify, which is characteristic of a link farm used for SEO poisoning or to obscure malicious destinations. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/wb?keyword=lacrimosa%20partitura%20piano%20pdf
    • http://files.designedbyjpp.co.uk/uploads/1/3/1/4/131408024/wemezofumaza.pdf
    • http://files.fatso.com/uploads/1/3/0/7/130775743/bijepisuxape.pdf
    • http://files.bowenpeters.com/uploads/1/3/0/7/130738921/pepebatanowurudopado.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/32020610097.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/23679259277.pdf
    • https://cdn.shopify.com/s/files/1/0437/5832/1821/files/winoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/49844245114.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/82818975659.pdf
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/65955935262.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/34685422022.pdf
    • https://cdn.shopify.com/s/files/1/0440/6683/2534/files/25728581708.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/zunig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/86481763321.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/fi

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000817a.bin
f97395901446598f04d6b256fc5ec6abaca75480ce9881573ccf062e9d92b457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 4976 bytes

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