Malicious PDF — malware analysis report

Static analysis result for SHA-256 473ff6093721d7e2…

MALICIOUS

PDF

42.1 KB Created: 2020-10-15 07:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 347aa29fb344164132c6ce9fc6ac4cfe SHA-1: bdddb8e4c4e72ce39c72d1f45dff3f6eec6f53fa SHA-256: 473ff6093721d7e2ea4750c330084cf5ece7e245fbd7e879e87a91e84856feb9
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://gettraff.ru/123?keyword=s+l+arora+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f873bb3281ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f87b76ea8707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87068315723.pdfIn PDF document text
    • https://site-1043576.mozfiles.com/files/1043576/pagobazileruw.pdfIn PDF document text
    • https://site-1043087.mozfiles.com/files/1043087/rureribonerosarid.pdfIn PDF document text
    • https://site-1042867.mozfiles.com/files/1042867/xorebuweranerifumu.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/titilegovaf.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/1193095.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/vikofepika-saxedakubepezun.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.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/aa841722-df8c-4539-bf58-98bfa703dcb5/nuradikuxomexuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b44787-f0c6-4de1-9c2b-4ba452cb999a/pivagipibun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7e16c8-6c4a-4210-8f1e-1bb237cfcaac/litew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9505578-5385-4413-a3cd-e502b24b2687/70692364345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f0be23-5d8f-4ce2-865b-ce4458d9ebbe/woxapetekafuruxugada.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EC 4960 bytes
SHA-256: ae62e71f54d7126a4d553e5060396a5f5c83581c90300a09532344fc2800272d
font_01_sfnt_off000063d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D6 10124 bytes
SHA-256: ffa509536ba160ed0c377e06f100cf5edf3e6417f0d4fe10b313438e2cc8b065
font_02_sfnt_off00008667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8667 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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