Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b538cdd0e758fa…

MALICIOUS

PDF

60.3 KB Created: 2020-12-02 16:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ff4b80524946998563c43dd537f7656f SHA-1: 9875238c059f8e43ad0820d01866e69f4cbef448 SHA-256: a3b538cdd0e758fabbbb26efac8c9bd7496e5bc3ffed10cdc7d7e740c5a9b8cb
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://gettraff.ru/123?utm_term=daikin+ac+manual+brc1d52 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5fbe91ec1ec12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_5fbda31159027.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/nitirew/14987420864.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc74ae8b7521d608a433b1f/1606896361176/93274450513.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/format_factory_app_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/bruun_hot_wire_anemometry.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/tevororekadigosevilev.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/nadifudadipegisitofuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc102e7bda9c57a97beca32/t/5fc1b2f39b1ed035381b72ff/1606529780184/rotisserie_for_grillstream.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_off0000b535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB535 5416 bytes
SHA-256: 8ba9526cf0f2e2fc4ba4099242fefb6678d504d777f3dad6ea6ada11afa11e35
font_01_sfnt_off0000c79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79B 8496 bytes
SHA-256: 343cac7fb65ae409da16bd8c72f75e5095ac9a649be69fc3204f4ee0a4e60b9b

Open this report in the interactive analyzer, or submit your own file for analysis.