Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0aed6e69bf7996…

MALICIOUS

PDF

93.7 KB Created: 2020-11-09 23:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0416cbabdbc0a270f793c263edbf8ba9 SHA-1: 9e69c2391e9a9f2b51777becc0a7c3f3d630694d SHA-256: ae0aed6e69bf7996a45f780341ceadc957b36c1013ff69174328a66731795800
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely used to deliver a second-stage payload. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The presence of a 'download button' lure further supports a phishing or social engineering attack. While no scripts were extracted, the PDF structure and embedded links are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=glencoe+chemical+bond+virtual+lab+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f88926d21c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_5f9e6f2fec0b7.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/linurigaruxox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f9ba3c637d27.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/0036205a-1399-403a-8f73-a6dcf35d9a06/punctuation_marks_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/animal_science_merit_badge_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/algebra_1_book_larson_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c514245d-854f-4a68-8811-2692cd881c90/pisubisapokiwijijunoleras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705ae2b6-c3fe-400c-88db-2b6a45895afc/1048724750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507893eb-79a2-49a9-b8bf-1ca20dbc8c93/dibitirodinusavunobod.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_off00012fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB6 5500 bytes
SHA-256: 846cbf2197864ce53b4c7c58405f0e81c3f2473c910c10b6186acab79eaf2645
font_01_sfnt_off0001424e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424E 11716 bytes
SHA-256: b02dc30cb5a37a6f0543deffbe39a2efe391ed0a77e73c9a80f94123de55df5b

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