Malicious PDF — malware analysis report

Static analysis result for SHA-256 91df55959ca0948a…

MALICIOUS

PDF

40.3 KB Created: 2020-11-01 08:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bf253c4411510e090de999633c8e69ad SHA-1: 5fe7fad4e21c0a37aa27857af9ea82843216d565 SHA-256: 91df55959ca0948ab4177b98e1d930b287a2cc2c0bd1691db1bdae3381e51c73
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users via redirection, likely as part of a phishing or malware delivery scheme.

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/aws?keyword=wb+50+truck+dimensions In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dupuvikadijuraxere.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/bizepig_sifalexupaxo.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/7b324388837a.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/8137758.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/xanebavifamopez/xalibun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef5ab95-f9c5-4277-beb0-b658a7d90bd6/wefusezuximesen.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/nifolujajemom.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/loxekosabutasezuk.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/99383800561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0417cd5-9ca4-4d95-a752-fd117bacd2de/yamaha_rx_v567_decoder_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eddad5-1f08-40d7-add1-c9c7f233af40/goletutonatasofeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9169/6056/files/argumentative_essay_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/jezomoviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b41a4d0-fc38-4d31-9f53-fc6be8964be0/suzuki_carry_f6a_service_manual.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_off00005f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 5324 bytes
SHA-256: 74818e331f78eca08525d2050f0a09d608829cad3894f7dbe3a31beffca146c9
font_01_sfnt_off00007128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 10520 bytes
SHA-256: ea2571d8a44579e09b1baf0a252b3cb16cd7983d133df8d2a2f986b2690eae6d

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