Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cf9fe10a3eab7e…

MALICIOUS

PDF

34.0 KB Created: 2020-08-20 11:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf7ebe7d28237814f3d272cb4c4a5fa4 SHA-1: a32be31090bb49cc35cfd2c93b8d9412c9c2a4de SHA-256: e5cf9fe10a3eab7e1cbe95f528b6a2f97ea7518413c180d2f4e5d7bf517be18d
160 Risk Score

Malware Insights

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

The PDF document contains a lure claiming to be a 'Garmin cadence sensor 2 manual' which directs the user to click on a link. This link, 'https://ttraff.cc/pify?keyword=garmin+cadence+sensor+2+manual', is identified as a malicious redirector. The document also hosts a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO manipulation or to obscure malicious destinations. The primary malicious activity observed is the redirection to a known malicious URL, likely to deliver a second-stage payload or phish for credentials.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=garmin+cadence+sensor+2+manual
    • http://files.kushaklaw.com/uploads/1/3/0/9/130969446/xilalarijewosalitel.pdf
    • http://files.morgankendallart.com/uploads/1/3/0/8/130814706/2741143.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/19364903636.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/50767512517.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/fomak.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/wevedidirinepuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/linevoxuwekizi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/58724743941.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/definition_of_family_business.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/mobowazovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/14656681243.pdf
    • https://cdn.shopify.com/s/files/1/0429/5806/1724/files/wobanenidesebozizujuvu.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_off000048ff.bin
55a89f647e2c7fe6656681b7d95f5bd8fe431ae7975cd013b3ab2f7a79011247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48FF 5248 bytes
font_01_sfnt_off00005abc.bin
4a7ecdcf475f85ed4044f194f77a109e48f3d28ba3c42c056a518eae4e519706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC 9584 bytes

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