Malicious PDF — malware analysis report

Static analysis result for SHA-256 f048a9a80513fb18…

MALICIOUS

PDF

33.7 KB Created: 2020-08-29 22:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ed733684944bcce99942ab0be72490 SHA-1: d4b2b67c3d623e03e30d2b92c564f6c4f46376f4 SHA-256: f048a9a80513fb18fd67c05ce76e1026bfe46378d17a7906f609a616cf6d06c4
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/wix?keyword=digital+snow+camo, points to known malicious redirector infrastructure. The presence of numerous links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute additional malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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/wix?keyword=digital+snow+camo
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/bovinafujikarapakibelafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/31547101405.pdf
    • https://static.usrfiles.com/ugd/b8c837_54d4cf8d3a224de9b0cee851fed2f3e0.pdf
    • https://static.usrfiles.com/ugd/bf650e_0c298b985b744095a8c244cd7c0cf007.pdf
    • https://static.usrfiles.com/ugd/5360f8_0125e5bb4aa84034a8efd5d53b0ec39e.pdf
    • https://static.usrfiles.com/ugd/b8c837_04441d11a284475b909021614dadf60f.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/are_you_addicted_novel_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/ruruvelulexemogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/63848290176.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_off0000446c.bin
91d411b4ae57d4e5ed6444ff427ea70a588d6012bb42c500031227832b36e260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x446C 5112 bytes
font_01_sfnt_off000055d5.bin
07946abb501465472246e1bdfe12362e7108d44c2755006c6e2534beaa0c2184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D5 10440 bytes

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