Malicious PDF — malware analysis report

Static analysis result for SHA-256 811915deacb73db1…

MALICIOUS

PDF

47.3 KB Created: 2020-08-08 13:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d4ff764f2e7a5062b71637dd402cee SHA-1: ecef4a6538adf0d117ddb1eb4333229fd5d29660 SHA-256: 811915deacb73db11213872ff8a8fc1c522a5fd56f08739c71e52c62af9d832e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=acta+de+nacimiento+mexico+pdf'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many of which lead to Shopify domains hosting PDF files. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click the malicious redirector URL, which likely leads to a phishing page or malware download.

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=acta+de+nacimiento+mexico+pdf
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdf
    • http://zululiki.westhay.com/uploads/1/3/1/4/131407406/kunipovedawu_fudetu_rodusa_napuwarizelafaw.pdf
    • http://files.lrbarms.com/uploads/1/3/0/8/130873908/dosiwifanawimuga.pdf
    • http://files.crossfitantrim.com/uploads/1/3/1/4/131452794/mojoxizuwazeg.pdf
    • http://files.livepurebodycare.com/uploads/1/3/1/3/131380847/9315040.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/34962303630.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/88309646749.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/swiftui_by_tutorials_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9167/2736/files/nomabalanu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/arduino_programming_reference.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/72904400989.pdf
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/94931154315.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/donuxifoviluxevisagisasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/sulogisupugevavujesabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/bexago.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/66624642492.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_off00007808.bin
c6564ec9daa0cd8874da4e772e17c0d71121e5cc7d5b0a921bfea7ea202c4029
pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 5052 bytes
font_01_sfnt_off00008936.bin
85d0eb696a267ac8e8ed544d65baf1c761cfbe22505509aa7c1335ec5e6fabb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8936 11384 bytes