Malicious PDF — malware analysis report

Static analysis result for SHA-256 014d8a0c63b1743e…

MALICIOUS

PDF

47.0 KB Created: 2020-10-26 14:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b3196bf473d8c788aec784257df5182 SHA-1: 4b9e5586f5f7f2796d53ec58e4c10ac3a790474a SHA-256: 014d8a0c63b1743e218ad10acb3f3eac0e56771fbdcc9c840872e0e446b8fc8e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier and contains a link farm pointing to numerous external PDFs. One of the embedded URLs, https://cctraff.ru/aws?keyword=o+significado+dos+vers%25C3%25ADculos+do+alcor%25C3%25A3o+sagrado+pdf, is flagged as a known malicious redirector. The document's structure and embedded links suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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://cctraff.ru/aws?keyword=o+significado+dos+vers%25C3%25ADculos+do+alcor%25C3%25A3o+sagrado+pdf In PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/9937636.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/8576615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f90b5b0d8759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f8749958816c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8f9def559f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f8762ed186b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f90f148e6b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f87657a850ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8901f21e323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8912aa9e291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8fd80933b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_5f969e55994fe.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/3ae81bcb-6b1c-455f-bef1-ea046cb1b522/wifejowox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edba7f93-aa9f-4286-80d4-d1de5900499f/computer_capsule_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d48082c-f20b-4be9-8621-72cc31312fe1/39352381593.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_off0000724e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 5784 bytes
SHA-256: ec7af75bdc55e68199976dcb5a5f23b278f9c897e572bcf02e1faa7b16129d2d
font_01_sfnt_off00008586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8586 12932 bytes
SHA-256: fff2c5ee519379d950a8aa4f0a77f1f95a9b63e0e5bbb1823ed42395680040d5

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