Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9cfcd6a4e066e3…

MALICIOUS

PDF

51.2 KB Created: 2020-07-29 19:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736e335f7f4729ae6ac9f94bbd76ec72 SHA-1: 35ed146269f68d6f5c630a0ab7856c554b6b977b SHA-256: bd9cfcd6a4e066e31da3f63e52db893dda0dfb81be6f1c213f774d8c9419d1f3
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites. The presence of many external links, including those hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to distribute the malicious URL. The document body is heavily obfuscated and unreadable, providing no further context on the lure.

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=complete+laboratory+apparatus+and+their+uses+pdf
    • http://files.the24hourccna.com/uploads/1/3/1/4/131453498/revolerolodome-tupukafogolu-potipebapelu.pdf
    • http://files.fbazin.com/uploads/1/3/1/4/131437516/xugaw-pijojisobokez-lazevezi-faxexikev.pdf
    • http://files.mamagonenatural.com/uploads/1/3/1/4/131437508/f7877.pdf
    • http://files.fallscreekcc.com/uploads/1/3/2/6/132695535/wifol.pdf
    • http://files.anandahairlounge.com/uploads/1/3/0/7/130739284/8b679fe1c.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/rutudira.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/7160087702.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/bijuguzejoladoxanaxud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/89297267644.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/73469257096.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4947/files/bififixekipireforikama.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/zajekalemegadasanarurek.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/xowenolov.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/67120493770.pdf
    • https://cdn.shopify.com/s/files/1/0433/8964/9054/files/30801291763.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/57545749743.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_off00008b07.bin
e3ace1a70c46fbb6bdf7e201680a0d19ae2c336ba7cce7a7d00b48a211b8d199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B07 5428 bytes
font_01_sfnt_off00009d48.bin
868841a9138f32f9a8f508a9484bd8f8ab6bce5e9d10987c370dc3d8a2c03dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 10008 bytes

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