Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b3f5d5b09233d0…

MALICIOUS

PDF

42.0 KB Created: 2020-10-15 08:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9266caae4a6807827f6118f94a06564c SHA-1: ded086420705bc93c1915364d5e18b7124342469 SHA-256: d3b3f5d5b09233d00afe57dde689abb0ce6668d3a5bce14f968ea9d9b1be84d6
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/123?keyword=carsguide+news+and+reviews In PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/2637506.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/jovegoxo.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/jaripef.pdfIn PDF document text
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/20380e35a47779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f87d69a4c287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f872f2b7a434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f876c39e05c0.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/a16a30452a4.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/pazituneviwow.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://site-1041950.mozfiles.com/files/1041950/lufanoruvevagule.pdfIn PDF document text
    • https://site-1042879.mozfiles.com/files/1042879/9546030987.pdfIn PDF document text
    • https://site-1043287.mozfiles.com/files/1043287/73268747038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8747122ef9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87b308dcfa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f87d709dd35c.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/1/0476/7793/1686/files/combat_mission_touch_apk_full_version_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7537/9622/files/mastering_the_american_accent_2nd_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3995/6385/files/rewefifekidazogugefavujob.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_off00006596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6596 5020 bytes
SHA-256: 8b8519451b00c75f0f023339501af1dbdc3d8a37e62567bf53be576b4d0a975b
font_01_sfnt_off000076c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C9 10592 bytes
SHA-256: 4fc1cf69ed96290998c073c5d5bfdf22e377c35787444a69be0ec8ac2c1a3252

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