Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45a8c005965e87a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 12:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b2bb06bc538bf5acf1c66e8a2128ca SHA-1: ebf9d79ee48ac9008e416b01fa66a3668120e4a2 SHA-256: f45a8c005965e87a134fa0d2faf4825b4b4feaeafdd3a2024e2cee0425a6fc4b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=bypass+xtrap+download'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The presence of a large number of embedded links, many pointing to Shopify, further indicates a link farm or distribution mechanism. The ML classifier strongly supports the malicious nature of this PDF.

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=bypass+xtrap+download
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/37411375596.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6054/files/18737721602.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/rolijajonowuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/90998879073.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/9747444545.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/gopujaxulex.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/37632987889.pdf
    • https://cdn.shopify.com/s/files/1/0458/5973/3657/files/fiske_guide_to_colleges_2020_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/93581834380.pdf
    • https://cdn.shopify.com/s/files/1/0434/9627/6128/files/54375491519.pdf
    • https://cdn.shopify.com/s/files/1/0437/2178/5498/files/card_games_for_windows_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/69488355165.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/zagibovagopugegesu.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_off000062f1.bin
beed50c6fd183ed74d6e3e1789abf85612bd1fb4a9ac932df1e83daf3711afc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 5264 bytes
font_01_sfnt_off00007502.bin
a9b2f7412bfe2d0a4957e71a1a72664f6ad4089da6f32664d300ca834eeec1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 12700 bytes

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