Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a62df110c006acd…

MALICIOUS

PDF

42.3 KB Created: 2020-10-08 05:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3f1ffd15e519dc7062df3ebcf6f412e9 SHA-1: 281214e5853734f453d53e1cac6b0be74b55f781 SHA-256: 8a62df110c006acd08931883782d5e9fb6635d9c5ecfedc7eec0909db3cc875a
184 Risk Score

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://ttraff.link/pify?keyword=joanna+russ+when+it+changed+summary In PDF document text
    • http://files.theayalas.com/uploads/1/3/2/6/132681488/taxapujuru.pdfIn PDF document text
    • http://gabodub.sugarrushcustomcreations.com/uploads/1/3/1/0/131070289/vezopovuzatikefil.pdfIn PDF document text
    • http://files.hettonart.com/uploads/1/3/0/7/130775645/4814087.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/85593770997.pdfIn PDF document text
    • https://site-1042446.mozfiles.com/files/1042446/xuziwilenupivixisufogepa.pdfIn PDF document text
    • https://site-1040595.mozfiles.com/files/1040595/19846231413.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/bimukezurapikadug.pdfIn PDF document text
    • https://site-1040250.mozfiles.com/files/1040250/jukipedon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/62741ae1-89a6-4f2d-b889-5ad0c397a512/bisenegebizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519f34b0-0dd4-4b18-96cd-81627b192827/10168984466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cddd8d0-b072-4c8b-a07c-f2c2e0f3af2a/sojagisigupuxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c61e80-a2a2-447f-bbc8-0c2a1bfe1176/masekip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5e5296-8633-4b1d-9bf0-8660835f70ab/4078053151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e715eb-55f2-4b25-be05-9889b4161d7f/98071968982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f670b4f6-f7e6-41ca-a7a5-d6512688bda7/5076222196.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_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 5504 bytes
SHA-256: eff1f250dcfad44758fca19dcdd028406b61e3206be1e1b82a06c58044d8907e
font_01_sfnt_off000079b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B7 10140 bytes
SHA-256: c37d98e782f952ac337ffbe0a864df4077f4b59031bd0448de63870d88383b59

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