Malicious PDF — malware analysis report

Static analysis result for SHA-256 9976912de561178b…

MALICIOUS

PDF

38.0 KB Created: 2020-08-22 21:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a16eb372b4f3feea863dc5d66d2dfd7d SHA-1: fc04dcbb33225596ee03cc8d41bafdc887841c11 SHA-256: 9976912de561178b5bf660d338cd9e85a1355142071457b0f808f7f5c20c550c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-in System

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a mass external PDF link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=uniformity+definition+synonyms, which is likely used to redirect users to a malicious site. The document body contains garbled text and embedded URLs, further supporting the link farm and redirection attack pattern. No scripts were extracted from this sample.

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=uniformity+definition+synonyms
    • http://wiramavuf.spaceartstrust.com/uploads/1/3/2/8/132816202/jabewuguwux.pdf
    • http://files.fernhouseembroidery.com/uploads/1/3/1/3/131384555/6029657.pdf
    • http://files.saintlawrencewr.org/uploads/1/3/1/4/131453255/4741528.pdf
    • https://cdn.shopify.com/s/files/1/0440/2659/3445/files/gujadevogotevinewudejol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/33263249958.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/957904672.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/ssh_key_file_permissions.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/winds_of_winter_sample_chapter_barristan.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/kosob.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/jspdf_autotable_header_height.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/zevubenixedozijifir.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_off00005678.bin
472909b7fd98bc62850d0f354803ba2fece00decd0c1a7b6861c0d755c5b06ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5678 4904 bytes
font_01_sfnt_off00006717.bin
fb19d92dfc4699b2962b80b87d985b1f0fdf3093bfafde40c832b921ca8fc7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 10648 bytes

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