Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfbe5b15984851d…

MALICIOUS

PDF

48.8 KB Created: 2020-08-11 02:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90891d63bb52caf686e98d8c6782e540 SHA-1: 8b15b0d06a9004131373697151beccd0ea45da0e SHA-256: 9bfbe5b15984851d8c5ede675b49ece317621a76bf4c7dc4f65341869e9faa22
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a link to a PDF about philosophy. The document body, though heavily obfuscated, contains the same URL and a reference to 'wkhtmltopdf', suggesting it was generated by a tool to create a malicious PDF. The presence of numerous links to Shopify-hosted PDFs, while mostly benign, indicates a link farm strategy to improve search engine ranking for malicious content.

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=alain+badiou+plato+s+republic+pdf
    • http://files.southcostaricatoursandfun.com/uploads/1/3/1/1/131164393/zuwaraj-puzofijuzu-pigigojipip-lagukas.pdf
    • http://files.hchsmusic.com/uploads/1/3/2/7/132740930/kifemopivod_gusozo_gajiz_wafelefeleg.pdf
    • http://files.mskenny.com/uploads/1/3/0/7/130739480/99fbcf0.pdf
    • http://files.theflatspot.net/uploads/1/3/1/4/131437293/koserapudag-fexememedi-pujirasob-debobimakem.pdf
    • http://babunim.zatoluxury.com/uploads/1/3/1/1/131164250/8be2201.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9777/files/legazubibefedab.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/rovamavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/65455469427.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/80685565537.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/msn_zone_hearts.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/98471694114.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7965/files/38107714274.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/retij.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/bisection_method.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/sublime_directory_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2869/2643/files/lafexinavuloj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/nuripiziw.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_off00008070.bin
d4c7bb2d7301ab61eb7169d9426677f4858137b395be4bf0cb3723279cc56c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 5276 bytes
font_01_sfnt_off00009266.bin
ec7c0fbd81c66a7a67ea758dd8027b4ff2e74d90ed0f78c031bca23d732a87bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9266 10376 bytes