Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e55af8cd8ca7803…

MALICIOUS

PDF

57.9 KB Created: 2020-10-19 01:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 64e4e9c0986f58bd3eae2a2dd9026d49 SHA-1: 921ad0111a1e4661f09ba2902328b43d3e3f723c SHA-256: 4e55af8cd8ca780398d0dbef79266c171750e6e86f3937e62c87c2005fb6fe7a
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/123?keyword=secondary+metabolites+in+bacteria+pdf In PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/eaff109ab94007.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/ef5858c355cfafe.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/tedawonuf.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/lezepasidixabazafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8bbb291c6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f874a1cb9e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f8cc491a0a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f875ba4bcd5b.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/1/0437/3220/5722/files/fnaf_toy_chica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4388/9562/files/nifiwulutotajez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027131da-74c9-4722-9ad7-3e75f9619371/zizojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ab94d8-d7dc-4d5a-97e1-e4c2a91d73c3/a_concise_guide_to_technical_communication_3rd_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb39163-bcf7-4fb9-bef8-8f086f8b1744/52501402523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e53d3c-195d-4608-a5d0-4ae56e4e0c7f/73710003912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216b672c-b596-4cfb-a9c6-07978e924874/mebifikefawulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2f458d-e888-451b-8734-0e6c63dfac2e/wimegizokod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33ff968-84d5-4a5e-8127-83344205f37c/74883804785.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA361 5644 bytes
SHA-256: 104eb7afd458b524e0b75a3713a348ffffe146309accc4ea6d3f3506a93e2a19
font_01_sfnt_off0000b670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB670 10416 bytes
SHA-256: 4b24ca5a338eeff49d51775a672d09571abf91610cfef03a5467a69570ae254b

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