Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a15a44b417d2cdd…

MALICIOUS

PDF

45.1 KB Created: 2020-10-16 14:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1ca008ab34ce33891250c861fa214b0d SHA-1: 25a14f51e4a180a275da06392d3b0619fcb3a245 SHA-256: 9a15a44b417d2cddf3c3e6716ec7126f0bfdbf091f04e1f8d082841437c7ee87
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://cctraff.ru/123?keyword=drawable+to+uri+android In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/7b43908c0f21e.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/lefiwakiwani-mowatumemozek-vepobanejez-nugito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8705d9be710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f87b31c929a5.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8347111.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/5809899.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/1/0496/5803/6373/files/58720938356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/subordinate_conjunctions_worksheet_esl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2445/2254/files/tabunonitipipatoresevupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56e212e-ec30-4334-84dd-7fef6b3b0501/pigumilodeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bc4a3b-788d-4eb6-9dc2-cc9bd8a1d106/dojarisoxodadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b57d48c-6225-46ef-b527-43d3e1aa2ee8/43863700730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c412dea-407c-40ed-a09d-f29b7a0a948b/jinunedetagitafuwok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e95656-40af-4725-8ca1-2a1e128616e2/26987180612.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_off000067be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 4872 bytes
SHA-256: c70ff5e674e3505c45373bacecfc30a81293184a202a173d77be4f64b8ff0c37
font_01_sfnt_off0000786e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786E 14092 bytes
SHA-256: 2014310af7e0efb92c7e5f9a07eaf2216d299861c017afd767a46d5a03358caf

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