Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac1749e4a1d7936…

MALICIOUS

PDF

39.1 KB Created: 2020-08-20 23:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2011834e3df1c0672be7b885d67b57e SHA-1: 4dcdcb287574272e8b2beb26b4cb7f28fe72f25f SHA-256: 2ac1749e4a1d793695d326c39b484b9a1cc5a7313df7dc0ef89e565bb011cfd2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=1080p+wallpapers+for+android+free, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to '1080p wallpapers for android free', suggesting a lure to trick users into clicking the malicious link. The presence of a link farm and a malicious redirector indicates a phishing or social engineering attack.

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.cc/pify?keyword=1080p+wallpapers+for+android+free
    • http://wuwakuse.aitnde.com/uploads/1/3/0/8/130874493/ninanoti_tegejikawosabur_dirudezigar_sofud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/kojojefolepidopuke.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/40768157794.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/equilibrio_acido_base_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/widelojozoxasuwum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/rirak.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/34069745868.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/biblia_reina_valera_cristiana.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/vumedisipuvejonetovovum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/66847756679.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/nukag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8204/6869/files/86585831977.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_off00005a67.bin
41380de192b162d8505fa0f24c7c0d51bf8fb57f3b6ceb119e9107597dfca93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A67 5420 bytes
font_01_sfnt_off00006cf2.bin
49116d50a922d1fad8ba2422b2514c9e8db04a66b1c6d6678f19d6f8b2e7259c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 10240 bytes

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