Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa0fbb6f0713292…

MALICIOUS

PDF

40.6 KB Created: 2020-09-12 12:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ef71e408dcfbb4f6fbcea40213b26e1 SHA-1: 540c19ff995d1a737eccc39e6ed2a56c5a440511 SHA-256: 8aa0fbb6f0713292496ad974366864f4769825dcd839284fe3d76c59f5a3da3b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/pify?keyword=chrome+for+windows+10++only'. This URL is designed to lure users into clicking it, likely under the pretext of a software update or download. The document body, though heavily obfuscated, also contains this URL and a list of other URLs hosted on Shopify, suggesting a link farm or redirection strategy. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site.

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.me/pify?keyword=chrome+for+windows+10++only
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/sodutikadikokin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/aerofarms_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/comfortably_numb_fingerstyle_tab.pdf
    • https://cdn.shopify.com/s/files/1/0463/6213/2635/files/aventuras_de_capulinita_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/ragnarok_mobile_judex_priest_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/30499548461.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/2645433849.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/risobatomatavitolanefe.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/nielsen_answers_support.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2261/files/acceptance_prayer.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_off00006317.bin
55ddd6eef4ddfc36a3e6ee96c23fb0060bd7b75a66ab8b7d292668963595f6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6317 5232 bytes
font_01_sfnt_off000074d5.bin
0200733df70abb6f50eaf2514a327c90c6568a2800e68139f2fdd65dfa567a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 9592 bytes

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