Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9c93271c876f59…

MALICIOUS

PDF

50.2 KB Created: 2020-08-30 16:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e5f32caa67a1ab4cc68bf8b6915edde SHA-1: 3bbef7c2177f1b087165df614037ee979754d0b3 SHA-256: ee9c93271c876f597ff197316f794020987ba081b5bfb4f226b7ab6dbedbaecb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, embedding a significant number of external links. One of these links, 'https://ttraff.cc/wix?keyword=viscosidad+relativa+formula', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious content or manipulate search results. The primary attack pattern involves luring users through these links.

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/wix?keyword=viscosidad+relativa+formula
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/difinebasigesosekimix.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/blue_guon_stone.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/34111810328.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/whatsapp_profile_picture_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/kruskal_s_algorithm_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/6207394827.pdf
    • https://cdn.shopify.com/s/files/1/0448/4068/1633/files/timing_belt_replacement_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/quimica_inorganica_chang.pdf
    • https://cdn.shopify.com/s/files/1/0435/9559/5938/files/how_fast_should_a_game_download_from_uplay.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49470024852.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8060/files/crystal_reports_calculate_days_between_dates.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/35405571999.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/galopulakewigonikaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/dark_souls_3_immolation_tinder.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/kuniveselininibuja.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/structure_and_functions_of_the_brain.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/agricultural_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/ark_taming_manta.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_off000075b1.bin
79e8bf5e3ba6d0667d0ee24f0f19060e714863f6b0c1fa58174957ff68a3684b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B1 4968 bytes
font_01_sfnt_off0000869b.bin
cd7a2fd0d24ba81bf252ac2dc1eef8c5b18a5bcb3833782339aa8e23a0b0a558
pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 11572 bytes
font_02_sfnt_off0000ac65.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC65 4324 bytes