Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c02c61cef321828…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 17:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b64613cbcc28f5a71f8b70410402053 SHA-1: 681fc6d79023631a9049d24ef11ee43be755a0bb SHA-256: 3c02c61cef321828f47d799f3a79398b40e7e646ba1e9ad11725bbbe789baa6d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a mass of external links, including one pointing to a known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'kindergarten worksheets reading printables' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous Shopify-hosted PDF links further indicates a link farm strategy, likely for SEO poisoning or to obscure the ultimate malicious destination.

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=kindergarten+worksheets+reading+printables
    • http://retum.starbrighttherapydogs.org/uploads/1/3/1/4/131407164/1a7e3c5fd4.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/jonepeziluworematuwawere.pdf
    • https://cdn.shopify.com/s/files/1/0438/2054/8253/files/data_innovation_one-_pager_template_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/48827122812.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/18857259995.pdf
    • https://cdn.shopify.com/s/files/1/0433/4233/2057/files/reading_worksheets_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/commando_2_movie_full_hd_pagalworld._com.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/59254473167.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/84811768587.pdf
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/fupovonejeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/jijefamuveravefafufibarav.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/25357017755.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/19363888432.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_off000068e4.bin
535d8ad3591f1dc4b26e0be5b970a3c58561e76c5ea10debd7c96e93c0cbaae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 5484 bytes
font_01_sfnt_off00007b88.bin
e2334a9fc634307bec3345ac86c334b36c4b3d2892af0a337e3d9d82a456a98d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 12308 bytes

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