Malicious PDF — malware analysis report

Static analysis result for SHA-256 524c0542b3c1a97f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 21:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6664708e60926b992ef2b4874437f8e8 SHA-1: d3cc48d9daaa339415524bd9782b84a4cb2cf2f9 SHA-256: 524c0542b3c1a97fad416cdd901d5d683cbbd23dfcd8e039ed9c1b0089f94115
120 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, pointing to 'https://ttraff.ru/pify?keyword=baby+carrycot+sheets'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0462/2771/8293/files/kijexovelidumukokumetuji.pdf'. The document body, though partially corrupted, contains the same keywords and URLs, suggesting a lure to a malicious site.

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.ru/pify?keyword=baby+carrycot+sheets
    • http://files.huesoproductions.com/uploads/1/3/0/8/130873902/1326642.pdf
    • http://nakag.stbrigidsschool.net/uploads/1/3/0/7/130775413/5853942.pdf
    • https://cdn.shopify.com/s/files/1/0462/2771/8293/files/kijexovelidumukokumetuji.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/11082285043.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/feelings_and_emotions_wheel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/41042217416.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/67723102317.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/gametogenesis_embriologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/56181748786.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ccf.bin
f1541d7a77591bb9debe534df738bf6b4d4c9bfba0c8c53fff4c24cb1ed57e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCF 5144 bytes
font_01_sfnt_off00006e41.bin
394c240c8e5f3aadab1a709b55e5cbcc1b47e189138539bd4f0501eb3f16b16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E41 2532 bytes
font_02_sfnt_off00007955.bin
d259bef2e04944938473ef36b9ab9433aa01d98b50a85a21363c7fc6b84b6c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 10060 bytes

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