Malicious PDF — malware analysis report

Static analysis result for SHA-256 90377eacfb99ae2a…

MALICIOUS

PDF

37.7 KB Created: 2020-08-09 21:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d54f9015616ce5f0e785cfd6c8f25d SHA-1: 470546338699a6d87dd28104632b8486f9d2c666 SHA-256: 90377eacfb99ae2a7784ebac40c908e5568d9b4c8c6ab9ddcc285e4ea786eab4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=french+accordion+sheet+music+pdf'. This indicates the document is designed to redirect users to malicious infrastructure under the guise of providing sheet music. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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=french+accordion+sheet+music+pdf
    • http://files.alexvincenttextiles.com/uploads/1/3/0/8/130874612/fc95a9.pdf
    • http://files.greekworld.store/uploads/1/3/0/7/130775200/tubew.pdf
    • http://kizut.stepoutnonprofit.org/uploads/1/3/0/8/130874359/rexatuwakulanasabot.pdf
    • http://files.pro-activemuscletherapy.com/uploads/1/3/0/7/130775462/firevapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/60418268634.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/javascript_order_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/zupisofuvogurilozuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/kegus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/98933331875.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/segaze.pdf
    • https://cdn.shopify.com/s/files/1/0436/0306/7044/files/pugoworigejibowatuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2261/files/75152430949.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/affairs_cloud_current_affairs_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/10tv_weather_radar.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3745/files/nisariwusaludaduje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/2599138910.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/vakiweje.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_off0000587e.bin
5b97d1688dd4520455488b7118a654bb8b0c018bf5e708df68ad8644d14ba607
pdf-font-stream PDF embedded font (sfnt) at offset 0x587E 5316 bytes
font_01_sfnt_off00006a6a.bin
4857c1c39bdf42c4b6db765ede9c621e22f7e9f3fda2178b5ab0f34683fe8380
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 9244 bytes