Malicious PDF — malware analysis report

Static analysis result for SHA-256 a963302bd6253637…

MALICIOUS

PDF

33.7 KB Created: 2020-10-30 06:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 343429c73bb279029c24ebeb22de45b2 SHA-1: 14dc34a94c9cd7174f1c9b698e2bd61a35e9341e SHA-256: a963302bd62536375b1d49a51d4711dbca998197c384c5ca16c3fa293d03fbb4
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/aws?keyword=basic+sigil+magic+pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains embedded URLs that are likely part of the redirection chain, aiming to lead the user to a malicious site.

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://cctraff.ru/aws?keyword=basic+sigil+magic+pdf In PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/9325577.pdfIn PDF document text
    • https://vepezifu.weebly.com/uploads/1/3/4/2/134265798/caeb5d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f91c9383b139.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/433c4d8cc5e7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f8c9fdeb922a.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/c9627d55960ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5f95031188a09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/86341278015.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/53105897413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2089/0524/files/mappa_provincia_di_cuneo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1189/9044/files/43645949011.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/baregudezifulosolikojases.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/coronary_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/mupijekoxovavinux.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/frog_pond_farm.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_off00004595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4595 5428 bytes
SHA-256: 61b2cb12f374b40b7c7d8ceef3a66f79c70ee135797a7662b8ffbcd5aafa1fa2
font_01_sfnt_off00005800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5800 10080 bytes
SHA-256: 4047204d85632b9d82b4da66c86e006c8a1d21599710f8307b71903557bd8b2a