Malicious PDF — malware analysis report

Static analysis result for SHA-256 475cc68db80d3d0b…

MALICIOUS

PDF

46.2 KB Created: 2020-10-27 19:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 99905e72284bfde7c76cf9fd0fb5aaad SHA-1: 55c8f568003b60e5feda90f25a9325ce9ee9044b SHA-256: 475cc68db80d3d0be8b346b23b42920de8b027eacec3d0e6e0f0d35a6a5a79bf
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/pify?keyword=angel+fanfiction+cordelia+pregnant In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f8e725072512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f923b80dbde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f91a02368962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f94226de3d19.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/b0ea2ce8de.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/8270dfdca3b83cf.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/4ce065df.pdfIn PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/9552662.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/gozudefosilupotam.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/2299267.pdfIn PDF document text
    • https://vuwejugo.weebly.com/uploads/1/3/4/3/134309576/dojuvejapi_bokaf.pdfIn PDF document text
    • https://bevokelas.weebly.com/uploads/1/3/4/3/134310014/0153080c2ba65ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007695.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007695.bin)
    • https://uploads.strikinglycdn.com/files/3682d3a5-1690-4912-8546-9c55d6c338ad/wozixeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4986538-2b92-48ba-87db-f2aee219a912/9403936937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac0228d-a4cf-41bd-8409-6a50c2c039e4/81884658657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/56786417528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3753/4619/files/fl_studio_gratis_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4719/3238/files/womutixagajutovulafonan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0636/1504/files/rich_dad_poor_dad_audio_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/36100181868.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/hallelujah_jeff_buckley_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/binigexa.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/american_english_file_2_teacher_free_download.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 extracted file (font_00_sfnt_off00007695.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7695 5136 bytes
SHA-256: aaece9efed67a166a4619786e440ab3d6728fa7039fc9f1e4154196e4ab720ee
font_01_sfnt_off00008815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8815 10244 bytes
SHA-256: cc8e46ad101d5c449bc9aa985864854822ebe13524493c86f4475d4602c7b57c