Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf596ecc666c6aad…

MALICIOUS

PDF

46.7 KB Created: 2020-08-24 09:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 004b5f2c58641afb4b86f3c87a740f35 SHA-1: c96acbb826caee4a358edd36d64b05042e75af9a SHA-256: cf596ecc666c6aad597d6abb62abad4f2ff089eb930d40ad81d698cca75a224a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDF files, a technique often used for SEO poisoning or link farming. Crucially, one of the embedded links, https://ttraff.com/pify?keyword=ischial+bursa+injection+ultrasound+guided, is identified as a known malicious redirector. Another embedded URL, http://tulolu.13lackkitty.com/uploads/1/3/2/7/132712358/a9d4c4.pdf, is also suspicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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.com/pify?keyword=ischial+bursa+injection+ultrasound+guided
    • http://tulolu.13lackkitty.com/uploads/1/3/2/7/132712358/a9d4c4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/vubogupowum.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/new_osteoporosis_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/tokog.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/16941476280.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/50787959879.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/rediburajumesivel.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/jagipixazopututuwotabod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/87186184851.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4649/files/3gp_movie_download.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_off00007a3b.bin
22440d6bde37c7e99bc8aa680d7d8d3882fefde94df69921733b720579a9d441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 5356 bytes
font_01_sfnt_off00008c59.bin
e26762045b9cd1238d3573ebec6698e9cc94ee7cb5c630791e0d97e81be5d360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 9928 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.