Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d2078d9fb69c80…

MALICIOUS

PDF

43.2 KB Created: 2020-08-15 05:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aca2fce52aaaee257e5ed53d0a7d3506 SHA-1: e8e73bab43dbadd20ed8ed86115fe266795fc096 SHA-256: a2d2078d9fb69c80cd7f56f5cc940a39810b408646c6644555979b040b629670
150 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, directing users to a URL associated with malicious activity. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links. The document body, though partially corrupted, contains text related to an 'Ameristar heat pump installation manual' and includes the malicious URL, suggesting a lure to disguise the malicious intent. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ameristar+heat+pump+installation+manual.

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=ameristar+heat+pump+installation+manual
    • http://wefop.pushpamalextalaiver.com/uploads/1/3/1/3/131398097/da50a3a70c6c1a.pdf
    • http://files.buttroselandscape.com/uploads/1/3/1/1/131164308/pitozupujapeda.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/pigoves.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/94792343472.pdf
    • https://cdn.shopify.com/s/files/1/0430/9090/3193/files/pukewovivatepubagojexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/vemawoxiligapabiji.pdf
    • https://cdn.shopify.com/s/files/1/0448/9333/9803/files/buffalo_wild_wings_menu_with_prices.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/assizes_of_jerusalem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/bavevipurimojug.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_off00006b5d.bin
f5bdbf0e57e67ec8566ef4d8e420b333a53e4e8857e2375e7f5adeeaec1dc036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5D 5048 bytes
font_01_sfnt_off00007c5e.bin
400f5f94385044d157dfa7d54f23e381e10d3cf3799505b8784cf5fc518c5aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 10624 bytes

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