Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac044ea56be7485e…

MALICIOUS

PDF

38.5 KB Created: 2020-10-15 09:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ac3ba4595f57969775ada286940f32ec SHA-1: 33153ec714965f834013a954ac83a04e836152fb SHA-256: ac044ea56be7485e3c197845fbcbd4033b5838358d0564daa30773e3b7227a1e
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.link/pify?keyword=betty+crocker+milk+chocolate+cake+mix+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f87aa915a7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8717c99ac4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f87880326112.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/87250998597.pdfIn PDF document text
    • https://site-1040142.mozfiles.com/files/1040142/guxawamaxinuleseri.pdfIn PDF document text
    • https://site-1038783.mozfiles.com/files/1038783/varufubuwajuvawin.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/zosunamovafow.pdfIn PDF document text
    • https://site-1043541.mozfiles.com/files/1043541/62235190490.pdfIn PDF document text
    • https://site-1040424.mozfiles.com/files/1040424/foxuwisaxuriwolari.pdfIn PDF document text
    • https://site-1039553.mozfiles.com/files/1039553/20852800867.pdfIn PDF document text
    • https://site-1043923.mozfiles.com/files/1043923/59593156336.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/mawozena-kewanobezure-saxekezato.pdfIn PDF document text
    • https://gituwere.weebly.com/uploads/1/3/0/7/130740556/1562145.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/7b44f697c7b.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/7cd9112d-0539-46a8-829d-ab5c202ee638/kisanarasolitigesev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81dbb0db-3db0-4539-8a7b-800843c97704/valagusugojavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c65c7d3-e80c-4e78-b30d-bbafd74e4d8c/fikuroxagabopen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ada016c-7d84-413d-b359-940c0be12f6c/pimajaniwobudisilelubufug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/16528968431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0829/3536/files/chatfield_high_school_phone_number.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_off00005098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5098 5324 bytes
SHA-256: 494ad45608f524f52ed4d78156b0367de95d40c7184daa224f80c0cee2757e15
font_01_sfnt_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 13180 bytes
SHA-256: 67b68a1f4246768676b82b8c3e011e17d6523e4fbe8d8174fb29a6af5f302ded

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