Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9dac190e0e21f7d…

MALICIOUS

PDF

46.3 KB Created: 2020-10-07 05:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 265b3d9e708b1d90488e21c18123fa4f SHA-1: 7903068a4b192425427b32d34b4aceeb5d417e6f SHA-256: b9dac190e0e21f7dc8d2acc3e2c641170ff189f1360e24e62094455f7cd8810f
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ttraff.link/pify?keyword=actividades+sobre+propiedades+de+los+materiales In PDF document text
    • https://site-1039301.mozfiles.com/files/1039301/56838841627.pdfIn PDF document text
    • https://site-1043095.mozfiles.com/files/1043095/15656848023.pdfIn PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/45384457831.pdfIn PDF document text
    • https://site-1048481.mozfiles.com/files/1048481/gudoxajizamazul.pdfIn PDF document text
    • https://site-1039259.mozfiles.com/files/1039259/78325987144.pdfIn PDF document text
    • https://site-1038882.mozfiles.com/files/1038882/nagolowokogirij.pdfIn PDF document text
    • http://files.victoriamartinphotography.co.uk/uploads/1/3/1/1/131163872/zirivi.pdfIn PDF document text
    • http://zudelufi.k9workinglinegsdvonbennett.com/uploads/1/3/0/8/130814017/2345345.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04548fc3-b0e9-4789-beb7-711b4bab1499/83936066038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7793da-2710-4a03-8405-d11288d37845/bijixek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a3f384-e5e1-49e1-803a-8ee523cd919a/4786409289.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_off000071eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 5408 bytes
SHA-256: f89df714aeda62979003de4bb750b6eef93507ea83fa1eb614ea76b098817e74
font_01_sfnt_off0000843a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 11852 bytes
SHA-256: 4adf438e6226d8980f4f3ed9d2c8ae4e4aec91ab55b5cf674834a33b6d53fade