Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4af61d265d0b88…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 05:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf76f7f4176c53f9e918ac70f42f47b3 SHA-1: a789f7339710904848f883fc07b13920334b64e0 SHA-256: fb4af61d265d0b8827a208babf3e0f8329e4a78450e373d67d12dfdcf8df1ac6
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=sistema+politico+socialista+pdf, is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the same topic as the malicious URL, suggesting a lure. The presence of multiple Shopify-hosted PDF links indicates a link farm strategy to improve SEO and distribute the malicious payload.

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=sistema+politico+socialista+pdf
    • http://files.jamtumedia.com/uploads/1/3/1/4/131437632/2116a7ce9d9.pdf
    • http://bigoxam.laurentianchurch.com/uploads/1/3/1/4/131438641/fenoset_fefoxalunukikes_zawivuxumip.pdf
    • http://wugagexur.mysoulsingsstudio.org/uploads/1/3/2/6/132683014/zufovawipidakasine.pdf
    • https://cdn.shopify.com/s/files/1/0434/1746/9080/files/malovofepowipumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/29197128228.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/xibabokimezoziximo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/58535213423.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/98581673973.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/jeraxeduwexuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/xaxuriporikegopixirenogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/wugupivezoretim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/6828138065.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/66068910820.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_off00006182.bin
5ad6cf7c75bc3ae97ad6b93fc746ad181e8aa44a9bc054e31ff69a058943e395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 5308 bytes
font_01_sfnt_off00007376.bin
fad4a49cccdaa5b1b26a929594a2fcbb8df64a1c97bd1e2a5d58b15d8e60e652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7376 10380 bytes

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