Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39f270706564a6f…

MALICIOUS

PDF

45.9 KB Created: 2020-11-04 10:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fd0efb862bc60627719fabebdcca7336 SHA-1: 19ca5370ca5392341c81243c5e687bd854136941 SHA-256: c39f270706564a6fd569ab0daf3156c73f04c94b434f3a5b5c65c6ce66e90f80
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/123?keyword=fbla+nationals+2020+results'. The document body also contains this URL, suggesting it is intended to lure the user into clicking it. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/123?keyword=fbla+nationals+2020+results In PDF document text
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/mofutumej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f874672a61d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f898b1d25c00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5f9af2860f078.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/marekarukedel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f8be42cf2ee7.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/dd7b258a-66e9-4aac-8da9-78cea52fb01b/82496270223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3378f06-3b60-4e35-9a70-63c0aee6c5a5/wurafivoweremiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0434b317-1fc2-46dd-9217-59bdcf0f0398/27837946362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83c9236-727c-4ef7-ba18-05a0a3ba8702/sokewekal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a61db1-0b65-43e5-90b4-a39836d21a9c/retumegopof.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zudawabatoralar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5e45f9-a3c7-4f52-8265-78e7819178f3/19441301632.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_off00007683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7683 5048 bytes
SHA-256: ba972d689a642350da596543dc94db240f4fcd80a889d114cd1521bb2d5fc66d
font_01_sfnt_off000087b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 10408 bytes
SHA-256: dacffa6992e6df6115fd44659ec31a8b430b69fbcad1c9e92fcae7601683c585