Malicious PDF — malware analysis report

Static analysis result for SHA-256 18347404cea76d87…

MALICIOUS

PDF

51.3 KB Created: 2020-10-17 03:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e71c6df0e3b2e787deadf313a73283f SHA-1: 0884b75f9cb1d325ed139f12fb3a946dcd50fa04 SHA-256: 18347404cea76d876b73bd1e480bc1a353bf0fd92aca393b11fdd0be2aa960fb
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=iaf+result+2020+pdf+download In PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/narobubo_nilaguvuzuvujeb_gomezu_fexogufuputat.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/zoguma.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/dagilug-gukakiwe-gevowadagego.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/jafinupud.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/050516f.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/lugixidonuvatir-kozilezetapafo.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/8536469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f88aea60c497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f884567bd259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f88d51ace1e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f89e0252a6c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f8a2a9f5375e.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/1/0430/6763/7917/files/20947877031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1547/7669/files/gevefobute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9399/3893/files/zuzukopaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/5597910998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/shy_guy_scp_containment_breach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8277/5212/files/bajonenudesejigagedofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8027/7916/files/jexexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7655/files/repin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b81130-04e6-46eb-be85-b6ba04928442/mitefilazanisigofuxuzumit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ce77de-baa9-48c5-83cd-4c5b0e9b947d/15498436393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4d9be1-42c7-4ae0-ad35-c9687e67e5c5/764920607.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_off00008a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5F 5340 bytes
SHA-256: e44c52ae5589174803261017ec7a28aae2a542f3d9904163e60d52ecf1cfc262
font_01_sfnt_off00009ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA1 10280 bytes
SHA-256: b42b3ad84e8ecc8c36f154d6592f03136dbeadb0504e397a68bd5cb9891413da

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