Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a24bb215be1752a…

MALICIOUS

PDF

39.5 KB Created: 2020-08-05 20:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b0a97a1a07e7a8204bc7cec4cca536 SHA-1: fbfa4071fd73372bb6d0ddf800e36c421a0d24bd SHA-256: 2a24bb215be1752aa532d4b0c67cf8a31cd1bee96976b20748b2a015182f75cf
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains this URL, suggesting the intent is to redirect the user to malicious infrastructure. 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/wb?keyword=solving%20simultaneous%20equations%20using%20matrix%20pdf
    • http://files.vickilynnsboutique.com/uploads/1/3/0/9/130969545/3d7311.pdf
    • http://files.yasminesinno.com/uploads/1/3/0/7/130739169/xozumojorotafog_sibit.pdf
    • http://files.mmac.org/uploads/1/3/1/3/131380666/8252533.pdf
    • http://files.laurapayne.net/uploads/1/3/2/7/132712000/vevutinak-nobugorobokol-wibaw-pezugikewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedepisolutiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/21056864307.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/fap_titans_promotions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/loderivifalorifida.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/46570081782.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/30894698911.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/xonaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/98178513094.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/emotional_intelligence_book_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/vasozevasolefabu.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_off00005a69.bin
d66daf70bb0d319594cc377e7fe9de725cc6a7a8d3500132cd9f3984a43c13f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 5720 bytes
font_01_sfnt_off00006dc7.bin
2212504cfe30c0f13989ad57afad75192929781dfc67eedb6f39fca96aa5e159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC7 10316 bytes

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