Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f629f76206e3ab…

MALICIOUS

PDF

64.5 KB Created: 2020-10-31 19:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d0cc70e751106d152ca44dd0b80d688f SHA-1: 9ccbb89a514883ac70e0e3c50c4d6fde7785d3f5 SHA-256: b3f629f76206e3abe60c9f854328118edb3fd748e9afae0394c50960c45d2ab8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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.com/123?keyword=ser+y+estar+ejercicios+nivel+elemental In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/jumajenanowarowafufiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/97907592379.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/nesixikufogoro.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/core_workout_routine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0101/9040/files/74787447351.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/klaus_vampire_diaries_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0514/7808/files/zuxot.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/access_florida_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/xisumuxufajedutiri.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/love_me_yiruma_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/wekapuniruwolokabusabim.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE4 5284 bytes
SHA-256: 74eda1ac50446664aee4df99ec3aaeaea4acf615c4de42b9aea6ed9c3688a3fb
font_01_sfnt_off0000cfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDD 11708 bytes
SHA-256: 86c0ab8aadff1a648e2d79ba3f37a646c9383d520d0ce52a0cb93b56e9f7d8a2

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