Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bdbae06b3027d4…

MALICIOUS

PDF

47.5 KB Created: 2020-11-03 19:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 96242cb6a18c3bcbad33714c0652691a SHA-1: be84c98de00813b05fdc425e21c2ef23fcc0f957 SHA-256: 90bdbae06b3027d4a1350eb399b976661302ceb05c67eb7a064973ad5d98b06d
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://ttraff.me/123?keyword=impossible+quiz+2+question+13+answer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5fa0ae3cc136d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f92148e96cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_5f9d2cf7856ae.pdfIn PDF document text
    • https://tipotorujaviw.weebly.com/uploads/1/3/4/5/134523694/gusujutidebomi_nasugivisaw_minasus_volisab.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/5776259.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/8748603.pdfIn PDF document text
    • https://wojegapemepuwa.weebly.com/uploads/1/3/4/0/134096127/4006813.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/mekofiwakomujuw.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/af3edff368d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f899c1b136b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xipavir/poultry_broiler_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113c4d70-8a44-4880-9716-8d70d9bcca0e/56866140478.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/ximizitixe.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF0 5656 bytes
SHA-256: a04df89c4d4c9876ee42beaaf6a18820e8821a12dfe16ba08fc79f5d4e635594
font_01_sfnt_off00008230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8230 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00008d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D93 10368 bytes
SHA-256: fd343a81e2fad9aeb5ea947ae37c45b4050b8d09638c50a49c36e612827d550e