Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b9cdef53cbbd19…

MALICIOUS

PDF

66.9 KB Created: 2020-10-16 16:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 409fa4a58e1075cea19ef344834d65e5 SHA-1: bfeab46e472f7da48ae6da9a1ce39aa8e0310830 SHA-256: 85b9cdef53cbbd19dda3fc2380b85e3859590daf883236f607240969cb691fc6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.club/pify?keyword=prithvi+vallabh+story+in+gujarati+pdf In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/gijuwu.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/f69a5d.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/7266703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f88c686286c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f8901977567a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f87ac3f4dc1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_5f88b1a531c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8828075005d.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/3803396.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/1465350.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/liwizufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2025/2846/files/vugitigaxesifejip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1490/3748/files/64532365651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4865/5784/files/18725740759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/disaluvusuwiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c067e7-c23f-48f4-b99b-79eaaa2c60f9/naguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26200c9d-f5ff-41aa-9a46-48b28a5463ed/kubuwenov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4370d46-5dab-4ae2-844e-82804e5025d1/xiwawenekutekiduluxuxuluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0feccf3f-a663-4e94-9ed0-fdb3cc50a7b7/90314608847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dff5d2e-55e8-4bf1-9f2f-59e16f9c7772/bipewizekovaxuvekafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de526e2-4816-43dd-80af-b87d0e705bd4/99928866316.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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000808f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808F 5680 bytes
SHA-256: b2c327bd443fce45f7219e903302afd332ff4359c302fd5db81c0ebba714d27e
font_01_sfnt_off000093e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E1 4388 bytes
SHA-256: 7e44af97c992edcf0051bb0204fc17d89ccb65810aca377932164cc056563c04
font_02_sfnt_off0000a25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA25F 10532 bytes
SHA-256: 7abae97ced7c0cec45fba6b161e01614c89669256905d2dc7d75d8eaaa340493
font_03_sfnt_off0000c641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC641 16860 bytes
SHA-256: 5e2572ff4b958e9c85dc292c016c0fac7e7e2506718fe64ab366792d9f6246bc
font_04_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 3248 bytes
SHA-256: a01fad042ba7ab2b24bb4592b72e9ad59d7a5028b4a8e04df5d34ec601be3005
font_05_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5252 bytes
SHA-256: 3d453628cc35bf07fb3233c960426ab0b368eef55c780ce601e1c21a8b6e4641

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