Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f325272a500761…

MALICIOUS

PDF

40.8 KB Created: 2020-10-15 20:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a3a36e8d2208386a40c1a56f95106c95 SHA-1: edb28169d2f5829681eb5e9968c988ee8658d749 SHA-256: 76f325272a50076184ecb89a8c8057366c2f1e751649c60c4e2248e1e90dcb8c
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/123?keyword=systemized+orthodontic+treatment+mechanics+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f87789f4f90e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87c7a133b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f8865e655b9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f880dac1fcf3.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/wagatefodefege.pdfIn PDF document text
    • https://site-1040878.mozfiles.com/files/1040878/60921091143.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/doxotavuja.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/gozavadar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87658328ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f878483c58a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f888b004bb9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f87671c7d42b.pdfIn PDF document text
    • https://site-1040248.mozfiles.com/files/1040248/wuginigulus.pdfIn PDF document text
    • https://site-1043117.mozfiles.com/files/1043117/koroxetokobovubufupanena.pdfIn PDF document text
    • https://site-1043796.mozfiles.com/files/1043796/76615460867.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/keurig_k_mini_plus_instructions.pdfIn PDF document text
    • https://site-1043600.mozfiles.com/files/1043600/6815677489.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/1/0437/1464/2070/files/vokogalukijewedotul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0974/9407/files/29238565767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/xugusogemesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1725/9173/files/insurance_answer_center_llc_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4919/5937/files/important_airlines_of_the_world.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_off00005dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 5616 bytes
SHA-256: 3b3a5d251e1ad8a8959d3b094fa4086cdd96f4579f9b49537c16546f3847cf80
font_01_sfnt_off000070bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 10268 bytes
SHA-256: ca655945c209be1be8649601847c0c22d5aece84afeb16a6e0e473d5f322b9ba