Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ef765f254bfde4…

MALICIOUS

PDF

39.8 KB Created: 2020-11-08 23:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 342973a4a6d73d05d9bcbdd793272386 SHA-1: cb642fc651d43fa125cedceccdcf328ce6bd1df6 SHA-256: d9ef765f254bfde4533b8f5a5cf71656c56b41355c84bc075c2a53a1b01b9a87
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, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ggtraff.ru/123?keyword=paper+tower+project, is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

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://ggtraff.ru/123?keyword=paper+tower+project In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f9cca247ae89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f95333a2628a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_5fa7f6469ceec.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/17e8e42a-5f85-463e-8b5e-8cdc0bf47701/bigger_leaner_stronger_workout_tracker.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/xixafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff25d29-4840-4e88-9d46-05a20cc75969/dofanabaduka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9041f35-cc0a-444f-8207-38253193dff6/bmo_investorline_account_access_sign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a148d5c-3a60-466a-ab10-aa7c7d2ea4cb/81706058216.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/models_2020_conference.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/tone_color_defined.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e3eb81-794a-43c2-9251-84311e2fdc5d/varugebekagijabenanoruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d097be-6ee0-49a2-af22-d4a711a90b89/folezupilewipomunir.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_off00005ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECB 4888 bytes
SHA-256: 503d790ea91a75af4d20d5c438326b3011a909428a66b2f11f45b419a7b626d3
font_01_sfnt_off00006f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F91 10216 bytes
SHA-256: 046b52356811bee939108535da5f2c76eb27de19118f4f1ddf342016e88a2e5f