Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ad49b9a7a078ce…

MALICIOUS

PDF

46.6 KB Created: 2020-10-02 07:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36c828ab6185408a40cf3ca7b434e3bc SHA-1: d0843b6246fdeb14df25cba663fc8eaae1457b21 SHA-256: 19ad49b9a7a078cedd5887d0a7e791f4e0fe4e1c2c1011e8db5958240690281a
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/strik?keyword=bewitched+and+bewildered+book+1+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user to a malicious site, likely for phishing or further malware delivery.

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/strik?keyword=bewitched+and+bewildered+book+1+pdf In PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/sisuwedetikadekowasuvani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9ab764-803d-4cef-a56e-f0b1004d9909/75103077125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78399c7f-6bba-4ab8-8dd2-73bb25cb54b1/rajebokazuzibibajivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae14331e-aa28-47b6-ad40-ea4936666a7f/tuvizefajokatatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d14deb8-fc32-4e0a-a0fa-aae43ff5a22e/pimolajovupar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f925db6-2b20-489d-a981-b871429a92ff/zujura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0796/2020/files/why_did_the_renaissance_start_in_italy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2857/4119/files/destinos_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/palutena_guidance_fanfiction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/nitivokuradutufaxaxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/83722777866.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_off000078c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C9 5464 bytes
SHA-256: cdd12da81f23df5a991b37a5600811448360f0b9029baea20eac8044d47e27a3
font_01_sfnt_off00008b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B68 10132 bytes
SHA-256: 096fa2cf14413d07abe04c2a2960736926ad386e398be667b9c0b6a497c4936f