Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e739456f2c39d9…

MALICIOUS

PDF

42.4 KB Created: 2020-10-04 23:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0e49192b8ab097487e7d41c5ab8f1268 SHA-1: 31fb3ed91b1113a65134d165c086027209ebb368 SHA-256: 50e739456f2c39d916c2caf45ca07a41130c15bbddfa2fad4beff294a638ad6c
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://gettraff.ru/strik?keyword=bodywork+restoration+tutorial+dvd+do In PDF document text
    • http://wafuxe.sandiegosuzukiinstitute.com/uploads/1/3/0/7/130738799/woxabikurig-geturidunefo-gefodifo.pdfIn PDF document text
    • http://juxozotev.das-designs.co.uk/uploads/1/3/1/6/131606228/besig_susilurugite_subajuw_dimodi.pdfIn PDF document text
    • http://pipen.harleybrooks.com/uploads/1/3/0/7/130739353/76c82a3f5f.pdfIn PDF document text
    • http://files.aboundinlove.com/uploads/1/3/1/0/131069869/nipumifabolej_wibuvupekefile.pdfIn PDF document text
    • http://tofijevas.alessandrabaccilliere.com/uploads/1/3/1/3/131380344/7513325.pdfIn PDF document text
    • http://files.bankonmemphis.org/uploads/1/3/1/4/131453695/boxed_bibafizexuro_naresiwuxe_mazuzexesume.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/1/0429/2398/3015/files/reading_food_labels_worksheet_for_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1198/3528/files/litcharts_their_eyes_were_watching_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39897aa8-9bef-4cc7-afec-696a785a2114/33093421733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d079b9-c22c-4679-9503-9076ea381aac/60829286776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e4ca26-e77f-4cb2-b215-0c6bab44903a/49869635862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c8823d-925d-4ac1-8b2c-3b30818b6742/xiguxoxedekepiratakatizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6de6fdb-12f6-49b0-a06b-aa05f285724d/xetas.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_off0000678c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678C 5184 bytes
SHA-256: 7a2a22a421fdfb7641930b4bbe17d3c8d7d60b76e12ec6a3fd1abdda07daad08
font_01_sfnt_off00007960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7960 10516 bytes
SHA-256: 316845e1f39281e9aa65406f1908f8379b8e1b66928b2103c147183564214b9d

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