Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67e6a4bb6b9b44c…

MALICIOUS

PDF

36.3 KB Created: 2020-11-07 06:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 078cfb60cb6792066208615512bdc9b5 SHA-1: b7d2c3ebe3d75b3d81a04f9f79b3ec5fb8181a00 SHA-256: e67e6a4bb6b9b44c60e5d89c0ffb4e90b872d78238963bdb88e79a0a2a417ec4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, disguised as a Pfaff 7570 manual. This heuristic, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to harmful content. The document also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=pfaff+7570+manual+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pozokimepe/xudeguruziwemuxure.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/16599307714.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/23907337560.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/bonetrousle_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c67c17-487d-4a98-898f-c932ec4d13da/tinulubopisatemupuji.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/pizutelot.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/nexagukujilepopapezoloma.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/nuzesa.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/boeing_787_aircraft_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/automobile_engineering_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/lefexoforelusisesopozowev.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/nitovebufakuwaron.pdfIn PDF document text
    • https://nalorirugu.files.wordpress.com/2020/11/facebook_blueprint_study_guide_2019_update.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4839 4788 bytes
SHA-256: 35acb9797fcea522971e0984e96684df68a3d5bd8414705ed4287d362acfa4f3
font_01_sfnt_off00005861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5861 8644 bytes
SHA-256: e3206fb03d9836c62715b136ce6d935ed5a3eb19df116c91334c5ecdc5fc2259
font_02_sfnt_off000075ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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