Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb8769b94f08d35…

MALICIOUS

PDF

47.5 KB Created: 2020-10-30 03:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a9dddad8f2f7958667206038fd13fe1e SHA-1: 9984dfab10a874b1c0a685ee7415673c0e06ac55 SHA-256: cfb8769b94f08d3543fa4e38d0de8fe5e3fa4ac3e6cd0bbb293d1efa1a9c6b3f
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The embedded URL, 'https://ttraff.link/123?keyword=why+did+the+us+supreme+court+rule+against+the+state+of+tennessee+in+baker+v.+carr+brainly', is a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to lure the user to a malicious site. No scripts were extracted, but the presence of malicious links points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/123?keyword=why+did+the+us+supreme+court+rule+against+the+state+of+tennessee+in+baker+v.+carr+brainly In PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/5534778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f942279cd16c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f959fefaf5a8.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/vagelonipumurij-xedutowixut.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/mewabes-femew-mujado-kubonifase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f8c775399077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f9686b9c205e.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/bamibababosugumizol.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/a3ccc5ab-b72c-4272-94ac-21833243e5ab/somonerifuzobune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58facfe1-2c4d-40e0-8fd2-fbe729002eba/acordes_de_cavaquinho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af630a7-083b-43a4-b57f-5557ea5e1e9b/3975021429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b821ec8-f011-4ab1-a16d-8c630a171e01/45410712695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462fb767-2d20-4a1d-b211-7226d42f0c90/81812470748.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_off00006423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 5980 bytes
SHA-256: 7b169540fa522fd57e01ea1da20614fbbbb6a33b206e49a7d4772e34180f2594
font_01_sfnt_off00007871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7871 10256 bytes
SHA-256: dee6766a66a18ebbddce8a9c10f0e67e372fd7ee57f8ab74ed13e660c592be8c
font_02_sfnt_off00009bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC0 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16

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