Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a645f4692818a0…

MALICIOUS

PDF

49.4 KB Created: 2020-08-09 03:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f28e63017c5610802689a98168f154e SHA-1: d6e5f6359c4c286c23ee5c917bd5078570ef6d12 SHA-256: 91a645f4692818a07f633a2688c5902e0fb91285239f70c90eda3dc17f3128a7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=bacitracina+bula+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be luring users to malicious infrastructure via deceptive links within the PDF.

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=bacitracina+bula+pdf
    • http://files.lornarenefineart.com/uploads/1/3/1/4/131483027/cef423be34fbd11.pdf
    • http://wefejeg.wnyata.com/uploads/1/3/2/6/132680813/kakirugag.pdf
    • http://suzod.smallsmusiclab.org/uploads/1/3/0/9/130969551/33276d648d.pdf
    • http://files.joseandresgiron.com/uploads/1/3/1/6/131606491/bufas-jutuwumugasani-misepumixip-lofid.pdf
    • http://files.mytgob.com/uploads/1/3/0/7/130775115/rivokudebuvuze_paguwixiraxage_lizugobewa.pdf
    • http://files.mytgob.com/uploads/1/3/0/7/130775115/r
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/44922794838.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/jepasolanejuxeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/online_attendance_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/21299735034.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/scales_arpeggios_and_broken_chords.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/14335635766.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/27620144121.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/10267144730.pdf
    • https://cdn.shopify.com/s/files/1/0428/9062/5191/files/rajomelaxibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/kuzugigakaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/zitabijisaderodud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/87999233508.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ca.bin
b5d50bdbad3aae3695cc94d53d94ef5c6a49c37f7a79c9d13c03a28c233ac55a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 4812 bytes
font_01_sfnt_off0000851c.bin
b51273b2774e48a13c8412107b17609c46ad0101dc7e818f32e6656c66ce1093
pdf-font-stream PDF embedded font (sfnt) at offset 0x851C 11672 bytes
font_02_sfnt_off0000aa33.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA33 4324 bytes