Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f7e2a072af20e1…

MALICIOUS

PDF

39.4 KB Created: 2020-10-16 00:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 98317b05e5f67cfa7907d9b83ac6cdc1 SHA-1: f02f9f960022e076ca6e305f23cf4b12375b51f8 SHA-256: c1f7e2a072af20e15bd8d8f8947f174bc8a4f1ff4ae456e494cc8e2903a20f11
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.club/pify?keyword=livro+linguistica+aplicada+ao+portugues+sintaxe+pdf In PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/96052807559.pdfIn PDF document text
    • https://site-1043908.mozfiles.com/files/1043908/nenosopawovopimejovuxu.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/xupafanugafalugogiwudasu.pdfIn PDF document text
    • https://site-1043119.mozfiles.com/files/1043119/99211407962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f8752c43e0f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8721318001d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8701fb2772a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f88c2f2a8e69.pdfIn PDF document text
    • https://site-1040558.mozfiles.com/files/1040558/tunnelbear_vpn_apk_free_download.pdfIn PDF document text
    • https://site-1048215.mozfiles.com/files/1048215/pipidonezu.pdfIn PDF document text
    • https://site-1043668.mozfiles.com/files/1043668/zulunonugerepavodomisato.pdfIn PDF document text
    • https://site-1039375.mozfiles.com/files/1039375/xaxaf.pdfIn PDF document text
    • https://site-1040442.mozfiles.com/files/1040442/muwapezem.pdfIn PDF document text
    • https://site-1036930.mozfiles.com/files/1036930/5244873923.pdfIn PDF document text
    • https://site-1042875.mozfiles.com/files/1042875/classical_mythology_9th_edition_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f882bfd148b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f87a8fec4736.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/04c1e3ea-b672-4eda-8d68-b9b3d10fd55f/28068455806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3463ce-3fc9-45b4-a562-895e942ca27d/87106719811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098b0074-06ac-4071-8d17-519e20992dc8/ruzosopidovaponajigixaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a846df-f47d-42b7-9222-b86152fc4391/kebiwoxolugojij.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_off00005672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5672 5392 bytes
SHA-256: f1659352437cb5f2a20af38987670cdf0a9bdcc23a95c462792536bfa07ee385
font_01_sfnt_off000068e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 12384 bytes
SHA-256: 773934e8983bcab21239e4353ceb3845b18136197dfa982323df5f337774157d

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