Malicious PDF — malware analysis report

Static analysis result for SHA-256 a427ee7aacaabdfa…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 08:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b293cf89dbf8a096cda67080e4f0650b SHA-1: 344c0cb1d74e98e87c696cb1ea8fa47719bce940 SHA-256: a427ee7aacaabdfa0402ea480f39918d63f8cfedf4b6c8ff1521166a522ae8be
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link to `ttraff.ru` is identified as a malicious redirector. This suggests the document is part of a link farm designed to obscure the ultimate malicious destination. The presence of the malicious redirector URL indicates an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

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=character+of+enobarbus+in+antony+and+cleopatra+pdf
    • http://files.terraceminorsoftball.com/uploads/1/3/2/3/132302870/bepabe.pdf
    • http://tibete.marcelstewartart.com/uploads/1/3/2/7/132712207/juxarotigeje.pdf
    • http://files.cupfestfairs.com/uploads/1/3/0/7/130739789/de553c13138b.pdf
    • http://wobipelo.ryanhalsaver.com/uploads/1/3/2/6/132681488/lumune.pdf
    • https://cdn.shopify.com/s/files/1/0432/0893/3540/files/23672122744.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/pdf_form_creator_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/pivavudefekex.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/16955289327.pdf
    • https://cdn.shopify.com/s/files/1/0439/7488/5534/files/sabamon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/supufujiginak.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/4431932216.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/34104871022.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/12487397248.pdf
    • https://cdn.shopify.com/s/files/1/0428/5693/9676/files/baloncesto_reglas.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7544/files/lijox.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_off00006813.bin
aaacfa6def41aa648aaa6db24a2c4d75a4e4bacdabf6d9fbd655ce2639fe563f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6813 5392 bytes
font_01_sfnt_off00007a5c.bin
7dc5d404059c67ce506e0d5f08d59355b8fe2fcc007babb1ead59cb2e2e774b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5C 9848 bytes

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