Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dfdeb7eba90df1…

MALICIOUS

PDF

47.3 KB Created: 2020-10-14 19:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1ab51508e9cba1e4fa6bd65e599f9c26 SHA-1: 72463312b395fd9814d6c59ff527d1596bf66dc4 SHA-256: 88dfdeb7eba90df14d65f1979f0e94eb1e47b1a72f1c3a411b832d72de8c495f
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://gettraff.ru/pify?keyword=hip+mobility+band+exercises+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f86f93d5f68d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f871ba9233ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86fb04c9e4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8707334c4fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86fcc2c4d8c.pdfIn PDF document text
    • https://site-1038608.mozfiles.com/files/1038608/85299770418.pdfIn PDF document text
    • https://site-1039175.mozfiles.com/files/1039175/muxopuvuvobemenifaniguso.pdfIn PDF document text
    • https://site-1043763.mozfiles.com/files/1043763/zuzojakitovododemebegonu.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/ravinosesedefegidurono.pdfIn PDF document text
    • https://site-1040341.mozfiles.com/files/1040341/13730978759.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/xipararetepimabevuko.pdfIn PDF document text
    • https://site-1042737.mozfiles.com/files/1042737/48705185774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f871d8447c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8715afe9a7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/75ca0bb9-bc27-46e3-9be4-175ef419faca/85333414399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd331af-d9b1-440f-9b46-69ecc86833eb/kemirofujetowikoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9179ddf-77a5-425b-a7d4-b3e6c793c012/78863213097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd47927-2fb4-4eb4-87ee-be3978e2f506/kowafiruvutadad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2297/4627/files/wosifebevifezisexudoritu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3497/5639/files/hospital_volunteer_opportunities_for_college_students_near_me.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 5360 bytes
SHA-256: 53016d60265f7963e2192a5d6fee7758568c46beaa43ed607d48b7789062436a
font_01_sfnt_off00007f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 10000 bytes
SHA-256: 2045aca719bdf5dfb51a77d1d671b837b5675306aeb3f45fa912f7fc717729ef
font_02_sfnt_off0000a1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3