Malicious PDF — malware analysis report

Static analysis result for SHA-256 faeafbaed38266c6…

MALICIOUS

PDF

36.3 KB Created: 2020-11-06 17:11:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bca9b5361fa3e895ad862e076fbf9ce2 SHA-1: 9cbb7aed3b374e0dd2212f9f2468cea760b6eab8 SHA-256: faeafbaed38266c665cef550139a3e747c1fd799f9d57bfed360b99d2f531709
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://cctraff.ru/aws?keyword=hacked+potty+racers+4'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

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=hacked+potty+racers+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f9622d765ecf.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/pexodugosa/smart_textiles_and_their_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/pagurafiv.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568c760b-d0b3-4d2d-b095-5aff55421db2/rodomun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8929da-4fdb-41b1-96ce-b9b0e6f6751a/17389942170.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/work_permit_renewal_form.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/27969104338.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/9619326443.pdfIn PDF document text
    • https://sibamefekin.files.wordpress.com/2020/11/zoziguw.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/xeloremomiw.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/first_angle_and_third_angle_projection_method.pdfIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.pdfIn PDF document text
    • https://kejepototoga.files.wordpress.com/2020/11/86720874390.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/ash_creatures_morrowind.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4691 3352 bytes
SHA-256: 3134af0e75966dad1d86373f0cdd4c5ad29520dc8cf21f92079cdc470754644b
font_01_sfnt_off00005291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5291 5248 bytes
SHA-256: 6429046e1b61ab93d3c9d86ca7de1028865ce50e4a097206c8c062e03fdbecff
font_02_sfnt_off00006486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 9300 bytes
SHA-256: 5be0006f3b9a2c1c23fd644d003063eb534d76a728b5be2ffb250fe60f25a12f

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