Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee56285976a19f9…

MALICIOUS

PDF

32.7 KB Created: 2020-10-12 02:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b621dab00a881312a879f45e73f5601 SHA-1: 0f8dc317fb24479dcf7b962628d4375c93b07c76 SHA-256: 6ee56285976a19f9e783275096908087478b512ccc6a8e0c8766d9064e6a2c0c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://cctraff.ru/pify?keyword=wacom+cintiq+companion+2+best+buy', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cctraff.ru/pify?keyword=wacom+cintiq+companion+2+best+buy In PDF document text
    • https://site-1038798.mozfiles.com/files/1038798/12508812642.pdfIn PDF document text
    • https://site-1040443.mozfiles.com/files/1040443/35596922006.pdfIn PDF document text
    • http://libosi.intensitycheeranddance.com/uploads/1/3/0/7/130776031/9301a50692d.pdfIn PDF document text
    • http://gipagal.lethbridgeelectrical.com/uploads/1/3/0/7/130776783/079b902.pdfIn PDF document text
    • http://files.frankfarina.net/uploads/1/3/1/3/131379117/978597.pdfIn PDF document text
    • http://files.lydiadona.com/uploads/1/3/1/4/131453194/zatatudumono-litesenejowej.pdfIn PDF document text
    • http://files.beeholistic.com/uploads/1/3/0/8/130814172/regekipujukutoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7213/1750/files/23767175625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9837/3013/files/work_work_work_everyday_song_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/ladenevojuzof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/2126/7878/files/33961866636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5430/0835/files/what_is_water_potential_in_botany.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/mobile_mardi_gras_schedule_2017.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4526 5464 bytes
SHA-256: bed95818b6c4e70b16e845b4d0f23171b773402091d0ae13a0ec8681b011fc64
font_01_sfnt_off000057bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57BC 8792 bytes
SHA-256: 9fdd352ada84b9147ced6c276afa33acb45ea5537da80b69bfeff9eb13f70231

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