Malicious PDF — malware analysis report

Static analysis result for SHA-256 1529f22ecd2d2811…

MALICIOUS

PDF

37.5 KB Created: 2020-10-06 10:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2e0be89b65ad9685bc3ea8a526abf223 SHA-1: 6cf6e02ced42612790ea929b72a2ac5dc0812bea SHA-256: 1529f22ecd2d2811a3d06484c811cbb51c2669d346efe808cea3a9e65f4b06cc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains a large number of embedded links, many of which point to disposable domains and redirectors. The primary link, 'https://gettraff.ru/strik?keyword=lewis+medical+surgical+nursing+4th+edition+ebook', suggests a lure related to an ebook, likely intended to trick users into clicking through to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a link farm designed to distribute malware or lead to phishing sites.

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://gettraff.ru/strik?keyword=lewis+medical+surgical+nursing+4th+edition+ebook In PDF document text
    • http://files.motlsa.com/uploads/1/3/2/6/132681308/3239972.pdfIn PDF document text
    • http://maxif.sanspointe.com/uploads/1/3/2/7/132740541/muzovodewan.pdfIn PDF document text
    • http://files.extrordinarycounseling.com/uploads/1/3/1/3/131379948/09a2b9e.pdfIn PDF document text
    • http://files.christschampionsministries.org/uploads/1/3/1/4/131411199/nusapifoge_zoxuvosilaba.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/gifixa.pdfIn PDF document text
    • https://site-1041779.mozfiles.com/files/1041779/resivetu.pdfIn PDF document text
    • https://site-1039140.mozfiles.com/files/1039140/7550188860.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/tujajagupofonis.pdfIn PDF document text
    • http://files.baonenterprises.com/uploads/1/3/1/8/131856627/tokimozozez.pdfIn PDF document text
    • http://files.holisticwellnessconsultant.com/uploads/1/3/1/6/131606128/nitesalux.pdfIn PDF document text
    • http://files.vexsens.com/uploads/1/3/0/7/130775846/waforumuwanaxogudo.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/1/0432/2240/1192/files/46141801310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0238/2504/files/corner_wine_rack_furniture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9265/9361/files/16381029952.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_off000054d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D1 5676 bytes
SHA-256: 8b62d7e8fcc6a587cb416e1facd8d4b05b62b5eec8d8062e297d31b5b1725b2d
font_01_sfnt_off0000680b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680B 9816 bytes
SHA-256: ff2fdcda6df5a41625d91af974eceb3de69010dd116f35556a79ab7d2bbeeb0d

Open this report in the interactive analyzer, or submit your own file for analysis.