Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75293ea11b4c8b8…

MALICIOUS

PDF

73.3 KB Created: 2020-10-28 16:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7422cc0c93a52d359e080353e86b2c59 SHA-1: 1f1885ac246d84d20207acfdfe56bbd52fc40551 SHA-256: b75293ea11b4c8b8cc68b8ca57acf17d864d5365201120a145c3237e356ba806
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://ttraff.club/123?keyword=what+is+a+system+in+environmental+science', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?keyword=what+is+a+system+in+environmental+science In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f89fa1b10610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f98abccd9ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8dceac1a840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5f8a2fa8b8d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f9273590e64d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5f9946a5b3289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f9630c8b5c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8724956f270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5f98f8e41eeff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f9192d979109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5f9247ec2eed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f8764796c590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f898b188cca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f917f7df2fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f8b0ed07dc41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f8e857a4278e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5f98e869db96f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f8a07ec3371c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f89dadb106d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f922ae122613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8708cf986f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f918e804a666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f877317c6622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f89c9ea867d1.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/da85f115-4472-47d0-807f-91095ba22c54/mesadoginojepabalewabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93fb4b4f-4937-4941-9165-27ccf60bf1b3/nadelowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369669f2-fdd2-457d-a255-5926c7c5517d/88683972025.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_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 5212 bytes
SHA-256: dfc5e3a0aea7998efff262cb00a4c867a6aa0db4aac245cb27840c309100b92f
font_01_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 11568 bytes
SHA-256: 3fc00b01c4d9a84ff623479d0e2be1a6a0429717e89d52c1966a49b4e1b4e90e