Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fdae0cecbc36d1…

MALICIOUS

PDF

45.2 KB Created: 2020-08-20 20:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ca2e1eeebf0a89418a4de5cb390eee9 SHA-1: 55e7be6ab85692d0ff6bd4a28419df002817cd25 SHA-256: 38fdae0cecbc36d1f5623d5ef17dcf61d8717a8416bf0abe13290c38014119c8
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a malicious redirector link, specifically pointing to a URL designed to lure users into installing browser extensions. The document body also contains the same URL and references to 'chrome extensions offline install'. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or distribute content widely. The primary malicious URL is https://ttraff.cc/pify?keyword=chrome+extensions+offline+install, which likely leads to further malicious activity.

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=chrome+extensions+offline+install
    • http://files.kristinlukanec.com/uploads/1/3/0/7/130738644/9b85b575ad7e98.pdf
    • http://debifeno.weberwaverlywatermainproject.org/uploads/1/3/1/4/131438416/xorap_mekelumogorub_fosisarag.pdf
    • http://kimuvidu.tygoyachts.nl/uploads/1/3/1/3/131382133/8443247.pdf
    • http://zokinar.thomasvasasphotography.shop/uploads/1/3/1/3/131383483/zadobovabekifew-nozebibu-lajunevap.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/glossary_of_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/biology_notes_for_class_11_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/biblia_hebraica_stuttgartensia_en_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/44254957353.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/corporate_taxation_examples_and_explanations.pdf
    • https://cdn.shopify.com/s/files/1/0436/6719/4021/files/32807815430.pdf
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/22831960041.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/fast_carbs_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/solving_systems_of_linear_equations_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8368/files/quran_arabic_to_tamil_translation.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/adaptable_architecture.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_off000067a6.bin
f5fc47ac803bc7076413a95d1fbdb384431a8176ed917038125643f98967f340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 4888 bytes
font_01_sfnt_off00007818.bin
c70da0aa76b3c59654fdf4df92561c6aa2d4d8eea445b94b926e61bbc38a25a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 9900 bytes
font_02_sfnt_off000099fd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99FD 4324 bytes

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