Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5a5e419ebba1bb…

MALICIOUS

PDF

49.2 KB Created: 2020-09-19 05:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a3583df972d0305f511b7972cbe88bc5 SHA-1: e1939d86902b1c27c0c04fe99e379298daa69ae7 SHA-256: 1f5a5e419ebba1bbe7bf088151a8752093e8b99e7f04aa6e8def785658e61f26
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://ttraff.link/wix?keyword=shakira+did+it+again+spanish+lyrics In PDF document text
    • http://files.insideoutclips.com/uploads/1/3/0/7/130739247/wozukijoxidavogefab.pdfIn PDF document text
    • http://rejefoja.wivert.co.uk/uploads/1/3/1/4/131482952/mezaluvolodef.pdfIn PDF document text
    • http://files.thetappingtrend.com/uploads/1/3/0/7/130776828/0faca514d35e9.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/1/0433/3427/1126/files/54516409571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/building_construction_components.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/divina_commedia_inferno.pdfIn PDF document text
    • https://16d28b91-ac31-4129-8689-f1550e9e4c78.filesusr.com/ugd/067ecb_0d53e2a26da14300912b561e6fcda1c6.pdf?index=trueIn PDF document text
    • https://1e852cae-8b8e-42ae-bd23-8a634e8022cf.filesusr.com/ugd/71fd01_e9b19b8ae81044f3b37a603e6d316768.pdf?index=trueIn PDF document text
    • https://85215b2e-8ccd-4648-943d-7de0784c288b.filesusr.com/ugd/696117_7e6e89675a2d4386a7d0e80c9111a3ce.pdf?index=trueIn PDF document text
    • https://32b3347d-38ec-4fe2-9004-1a2592c41ae6.filesusr.com/ugd/4f92c1_3bb822600de74d5aa2e34ccc53926c46.pdf?index=trueIn PDF document text
    • https://2999ada2-aa71-43a2-9054-b930d4e0b51b.filesusr.com/ugd/45fd81_e6088f62f7cb4c8fba7695ff79580648.pdf?index=trueIn PDF document text
    • https://53d034d4-85ca-440d-ac58-d2dba3a529db.filesusr.com/ugd/8e6e76_90fae79e04a246ea9e5a4ff9a124a540.pdf?index=trueIn PDF document text
    • https://d64914ab-b221-47e7-9e9a-543027341413.filesusr.com/ugd/72b0e7_41d0f0c2179841a3bce17ff2ff7e07ef.pdf?index=trueIn PDF document text
    • https://92e2ce07-2dee-48a7-a909-7b6d193317c8.filesusr.com/ugd/d7d6cd_af6c2d168807468e8ffb148291845d6d.pdf?index=trueIn 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_off0000814f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814F 5604 bytes
SHA-256: aa67ef41af69e26db26a8e63e98092c7b0e98491afc62b91efb444b1546ea346
font_01_sfnt_off00009464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9464 10320 bytes
SHA-256: 8ebe733e8ca546a80ca011f98986ab6e8638a1a03de5ce4dc0b9b5c653680da2

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