Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0062bc91b5e9ac…

MALICIOUS

PDF

48.1 KB Created: 2020-07-28 19:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bca1cfc251b45d30fd7a0a35658162e SHA-1: 6aacf7cbb05bde2227a90beef8a1f778a0accf1c SHA-256: 9e0062bc91b5e9acb0be7448842ff7e4aca0c73223bb7bc4689d493599d49e42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains a fake CAPTCHA lure to trick users into clicking a link. This link, 'https://ttraff.ru/pify?keyword=usb+bootable+device+software+free', leads to a known malicious redirector. The document also hosts a large number of external PDF links, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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=usb+bootable+device+software+free
    • http://files.kootenaycolumbiatherapeutics.com/uploads/1/3/0/8/130814680/02c90a887.pdf
    • http://files.proyecto1867.com/uploads/1/3/2/3/132302913/mozolejemi-vexiramiga-leselu.pdf
    • http://files.vk3sn.net/uploads/1/3/1/8/131871894/d40f274a4b81b4.pdf
    • http://files.trinitypreparatoryschoolnj.com/uploads/1/3/0/7/130739043/mekumawimotuzove.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/zebagukip.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/46684622105.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/tuxevaniges.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/ganul.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/46540259924.pdf
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/47561531170.pdf
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/60126769769.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/kapujakesevesiwonutija.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/48998724721.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/pezulisawim.pdf
    • https://cdn.shopify.com/s/files/1/0438/3804/6365/files/nikoxirexuzawara.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/ginojixe.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_off00007f96.bin
352d665e840b3ff0ed7b9801a39b372d6fbe708cde2347cabc6d739ec2226d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 4980 bytes
font_01_sfnt_off000090a8.bin
6302594c5ea1281b0d3d97c4311f3204c15bef4fb0861cddb284c9df300847fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A8 10040 bytes

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