Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c145ba8c5a2787…

MALICIOUS

PDF

45.4 KB Created: 2020-09-28 18:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 528eaab97f011bf39b4a96aa1f745b31 SHA-1: d05dc5cd6436a43173c4339c0ab79d08e275adda SHA-256: 86c145ba8c5a2787a96462a64ea11c8f83c262bcbbe572601fa3732bf63986aa
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 disposable hosting and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the document's structure and embedded links suggest it is designed to lure users to potentially harmful websites, possibly for SEO manipulation or to serve further malicious content.

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/mozel?keyword=pdf+analisi+logica+tabella+sui+complementi In PDF document text
    • http://files.earthlycreations.shop/uploads/1/3/0/7/130739088/427732.pdfIn PDF document text
    • http://wipet.kandtgurlygurlz.com/uploads/1/3/1/4/131438577/sibejovo.pdfIn PDF document text
    • http://files.thepaintspotinc.com/uploads/1/3/2/8/132814906/6254316.pdfIn PDF document text
    • http://files.luvmilk.com/uploads/1/3/1/3/131398010/aa0fa.pdfIn PDF document text
    • http://files.rajahmaples.com/uploads/1/3/1/3/131397971/fa178c.pdfIn PDF document text
    • http://files.tdcfamilylaw.com/uploads/1/3/1/4/131483662/6938921.pdfIn PDF document text
    • http://files.rachelsilvert.com/uploads/1/3/1/4/131454560/054425c1be96c9.pdfIn PDF document text
    • http://kabefe.thevagrancy.com/uploads/1/3/0/7/130776138/mabebojepubiwef_joropav.pdfIn PDF document text
    • http://xiwep.jasfinsecurity.com/uploads/1/3/2/7/132741508/masonamazamevog.pdfIn PDF document text
    • http://files.pristineyc.com/uploads/1/3/1/4/131438759/jokuwipiwixur.pdfIn PDF document text
    • http://files.ujimainstitute.com/uploads/1/3/2/7/132740536/ripuredu.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/folifiliwuliradozebusax.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/46219018714.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/perunonalovijozi.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/fegujonetadofiboros.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/72580195816.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 5520 bytes
SHA-256: 9e48083a30debfac088c7254ad6815be57d11e104ce65f9ee5700db6c7a72067
font_01_sfnt_off000082b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 11124 bytes
SHA-256: 3c559283801f46353c4fc832fa098801d7157c6c63b0b8920f76d3555db08f06

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