Malicious PDF — malware analysis report

Static analysis result for SHA-256 542b246e951d90e1…

MALICIOUS

PDF

41.1 KB Created: 2020-11-02 06:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3870780959fc6ddd2918ef96e7ba09b SHA-1: d9eb1f12a6c100d4583185d4135048b754279c6e SHA-256: 542b246e951d90e199239cc41a1c8633f50d401c8b584b513ff4452924fce630
94 Risk Score

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 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://gettraff.ru/strik?keyword=sextuplets+cast+netflix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f8ca5bb69fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f9e963ae2648.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/1365943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f9f6398d72c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f928e6d981d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5f9abf3b5264b.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/4c2fe455eab22d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420244/normal_5f9e708cb2978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/convert_jpg_file_to_online2pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4368/5030/files/35821232449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d388cc76-eb62-488b-b8de-793ec76c7f80/55349534908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19be014f-f43f-481f-958f-76e871273264/ruwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb81c9a-6e2b-4745-b369-96928ea790de/ledufo.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_off0000623f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 5084 bytes
SHA-256: d5cf279ca173881c2f4ba257d451318b113ef0c4e01c3a0fce3ec81012e74560
font_01_sfnt_off000073aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AA 10592 bytes
SHA-256: 8e7590744c561348d31f592245e5bfb8b6883ce59e63fef6ca39bdb22bb9c9b2