Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8d3460a2c40b6e…

MALICIOUS

PDF

40.0 KB Created: 2020-10-03 03:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d54415a0d20d3412f9547b820eac19be SHA-1: 2b998a1d655489bdfd6c16dccc599e3ef075343b SHA-256: 8d8d3460a2c40b6e26fa18cef4d761289fc00601b6ca5ff24bc2cfb095beecbd
94 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a musical and the URLs themselves, suggesting a lure to a malicious site. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to an attempt to deliver a secondary payload or phish for credentials.

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=hunchback+of+notre+dame+musical+pdf In PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/disijesubo.pdfIn PDF document text
    • https://site-1040373.mozfiles.com/files/1040373/33885066286.pdfIn PDF document text
    • https://site-1039400.mozfiles.com/files/1039400/zoxemaleruninidaran.pdfIn PDF document text
    • http://fupatot.acworthexpandinghorizons.org/uploads/1/3/0/8/130874666/kobenifovijujino.pdfIn PDF document text
    • http://pipoda.yogawithanniebarrett.com/uploads/1/3/1/0/131070197/jarusalaxovoseg_wejobege.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/553bec11-5739-4199-a28e-ad8e7665d1ab/vazigemoxegibexoperalidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab2fd63-2bb1-43e9-b6a2-3e2c32d70489/62537430351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85632e8-7a8c-4dae-90d9-60acaf0d9ada/dozunirix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a521a8-a88a-4999-8005-08813d2bc18e/vupewizidiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adff5f5-59cc-4338-be39-1e9b08fb1637/87803358970.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_off00005c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C77 5560 bytes
SHA-256: afe4893f9c5d87b21c02e201770fe22bdd2d52ddd4f5e242055ba6d3f24f9bb0
font_01_sfnt_off00006f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 10664 bytes
SHA-256: ba5f1fb4408d7c5ee1290fbb93872e5a1b030b04e844772bccd66edd00056d74