Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb00ce0fcd161817…

MALICIOUS

PDF

58.0 KB Created: 2020-10-26 07:25:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 59a1278093757253ddedc56cd7d4bedd SHA-1: e2b866e019fa15ed4db8fd701ae5b1201a03ec6c SHA-256: eb00ce0fcd16181741d768dad7cda15d58c237f20f1f02f8acd55f0ba8728f30
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 one identified as a malicious redirector and others forming a link farm. This suggests the primary purpose is to direct users to potentially harmful external sites, possibly for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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.ru/123?keyword=classes+of+matter+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f89284f544f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8f6a64e6359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f948653c6825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f91ce7fecafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f95e5a3d584a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f8e3673cfe8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f8a42d436e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f8bb03d1d3de.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/jupotapinegabuwexaga.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/jisomokoline_sulebukagelur_xewakolino_wudime.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/67995fc8-4635-4f5e-8268-967f9c1d10be/23479190714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80a9c9c-c008-4a91-a3fe-47ae72a44c89/shatta_wale_am_an_eagle_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1951b8e6-1959-4b7c-9f5c-d9af0df1146d/62619179271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7a4897-791d-4ee6-87e1-6edc59cdf64f/99523809848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3771/9717/files/clases_de_artropodos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7234/8870/files/uae_detailed_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2280/5913/files/house_of_cards_bts_lyrics_romanized.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/ionic_bonding_and_ionic_compounds_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/fogilakagokikobesuj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FB 5092 bytes
SHA-256: 8c8cb371e10e3b79cbd92a17b375713b5783e8fc4d5052ed3439c592be02462a
font_01_sfnt_off00009b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B31 10768 bytes
SHA-256: 3cf4e3bd0f460605a503ee1c7e5a3fc912b860dfee18ae8ce5939da4ceb23f09
font_02_sfnt_off0000bfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA5 17732 bytes
SHA-256: 601289fb7572c1ad779aaa4ee6800ca68ccdf43c306bc91e65a340e504c86dc8

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