Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0335b3766630ff5…

MALICIOUS

PDF

36.7 KB Created: 2020-10-31 20:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: df5413cf24b3fbc5a30e1678be9500b9 SHA-1: a8023330f0605bde720b09fb2b1632652b771020 SHA-256: b0335b3766630ff52cc1342d445ca0e0a09586f5594fcbdd6d82fb8275902ecf
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=mmd+dance+motions In PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/fa86258cdb53a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_5f98518a42c7a.pdfIn PDF document text
    • https://bolefapazudakaj.weebly.com/uploads/1/3/4/4/134478960/1870679.pdfIn PDF document text
    • https://zinawadasug.weebly.com/uploads/1/3/4/3/134312837/befuva_xezapez_vemetezupikofob_roboxetemewu.pdfIn PDF document text
    • https://jumabesabixoduz.weebly.com/uploads/1/3/4/3/134368642/kupozifis.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/vugezavorinepolevaze.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/polilunuvukamu_jajulijo_tapusidelobodav.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/1/0266/9114/1801/files/48086986264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2403aabb-1252-4739-b25a-46b746652d46/52631281738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1295ab0-35bd-4d4a-b4fe-d924bbcc3629/28807771267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1db2197-f869-4bce-b424-3ca2a8709d6e/luduwitekujilerited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/56623783991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6257/4279/files/ionic_deploy_android_device.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_off00004ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE0 4960 bytes
SHA-256: 2b825f08f1f28d3850b361a2038605764c70e3111787c71f5a5adb5c41deab3c
font_01_sfnt_off00005fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 11640 bytes
SHA-256: 383f436b272410d5685b9580c12aa376d1f19c98a1399e87c92c10da69dbe4ea

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