Malicious PDF — malware analysis report

Static analysis result for SHA-256 04208d0598ee797b…

MALICIOUS

PDF

76.0 KB Created: 2021-01-08 16:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1d6e7e9c66bd1ebf7e20cfcf4daf66d8 SHA-1: 7e183640353396435e63ef8893e6cae0705be74f SHA-256: 04208d0598ee797b51488d97b2a259d3f0afcc46babba92639fede56c1aa6dd8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least two identified as malicious redirectors. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings indicate it's part of a link farm designed to direct users to harmful sites. No scripts were extracted, but the sheer volume of outbound links suggests a primary function of traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=dr+rico+perez+diabetes In PDF document text
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/3611006.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/vuvesunikaxeguvozun.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/hggfjhR/18259278257.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/ichi9jh/68687920167.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/KdibjfF/hitask_manage_team_tasks_and_projects.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/2geKgdj/farmville_2_country_escape_unlimited_keys.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/i6haDE0/tixudedu.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/07f74412-ece0-42ad-a903-4c50565c1490/study_guide_for_human_anatomy_and_physiology_chapter_1_the_human_body_an_orientation_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7795da0-7097-4945-8252-acaa0aa928be/44316377749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84ba54c-7006-49bd-a0ad-08f70b88a017/minecraft_1.12.1_apk_pe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c252ca0c-440d-48b4-a170-dd2a98397f90/bose_qc20_apple_vs_android_difference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3947bd-634b-412f-bf9a-2f0bb1cd9ad1/15582596398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e94275-6bf4-49e6-b826-0207b2ff0b89/fevukedazuforabiro.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 8

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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5224 bytes
SHA-256: a54c9045580d5c64a9d99056f4a8dd0e317b2ee9b063cdfef86e4b70de4647fe
font_01_sfnt_off0000ff77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 10484 bytes
SHA-256: db323e1ad69043656814fe730d8935ec9f7af6e65b204bfb9c79a154ae82f37d

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