Malicious PDF — malware analysis report

Static analysis result for SHA-256 545a8c47d15cd019…

MALICIOUS

PDF

40.7 KB Created: 2020-10-07 03:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2f7b65205ee18bf8d837495b73a9ff85 SHA-1: 540597894cbfbdd78c2babb22f7b0971264b15dd SHA-256: 545a8c47d15cd019c776b035f3211a873e08015ea692f3914a47e42a741cf441
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.club/pify?keyword=web+of+life+activity'. This URL is designed to redirect users to other malicious PDFs, as evidenced by the multiple suspicious PDF URLs found within the document. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.club/pify?keyword=web+of+life+activity In PDF document text
    • http://gosokep.glamsquadatx.com/uploads/1/3/1/8/131871518/naxepat.pdfIn PDF document text
    • http://files.stephenschumann.com/uploads/1/3/0/7/130739769/tibowowug-pezukajirun.pdfIn PDF document text
    • http://files.staffordhockey.org/uploads/1/3/2/7/132740547/lulek.pdfIn PDF document text
    • http://vikerenel.espressowilltravel.com/uploads/1/3/1/4/131455069/suguminag-nositutetasube-ligopaxetolaz.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/010c3c2c-e041-4579-920a-45951459d574/luxanix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5629a51c-fdf1-45c6-8f6e-a9df0503249a/79635126822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc51415a-06f8-4b0f-89ba-cab14d5137e8/71080966214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba82cf96-fe53-46ca-8ad3-700671256224/sagebopajesulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac36b77c-6897-4526-af56-d4cb71d16387/29586270900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4238a3b0-15a2-424a-9e05-b0f8eab1c21b/22660485995.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_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 4916 bytes
SHA-256: 4e4e2271da4d2441b88aedde7047a270a5bf13a73be2b96b6e3c85dc21d04f70
font_01_sfnt_off00007403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 10120 bytes
SHA-256: 95f9b87989d367a5941327416c9ff40592f170bf9da0bdf77405f75285f544f4