Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b13b7264a97ac45…

MALICIOUS

PDF

44.6 KB Created: 2020-10-25 22:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7ec34caffe54572ebcad6c337d02f3cd SHA-1: 7624318f86ef43ac993c4cb2a24a09ced04c6b43 SHA-256: 0b13b7264a97ac4598ee892e258ccd94b5503efeb4c6b53c45ae820f6fabab87
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/aws?keyword=business+plan+cover+page+example+pdf'. This URL is likely used to direct users to a malicious site, disguised by the document's content which mentions 'Business plan cover page example pdf'. The presence of numerous other PDF links, many pointing to S3 buckets, suggests a link farm or SEO poisoning attempt to improve the ranking of the malicious URL. No scripts were extracted, but the embedded URL itself is the primary indicator of compromise.

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://gettraff.ru/aws?keyword=business+plan+cover+page+example+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f947c5fb701d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f91f305ac1fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f92d7de20caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8712805dd01.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/puzasi-giwowovejuw-rifomigan-sawupikupamod.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/33f825c3ca9.pdfIn PDF document text
    • https://sotodivejezaze.weebly.com/uploads/1/3/4/3/134391575/jadasetodi-fudimovabarupex-bafaji.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/sujezegodib-jimuxedowutepij-lufumuji-tavisekuwas.pdfIn PDF document text
    • https://galuxenezinex.weebly.com/uploads/1/3/4/4/134437763/a214dc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/adobe_acrobat_reader_dc_reduce_size.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/livro_arquitetura_bioclimtica_do_espao_pblico.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/clinical_research_associate_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/39918278184.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/13882464813.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/verib.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/dovomenubudonubi.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/55114501063.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bonupewabube.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/new_opportunities_education_for_life_elementary_student_s_book.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/cg_police_written_exam_date_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/bhagwat_geeta_book_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/tonuputukuripusawi.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/xodejoruwipiboviwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/school_leadership_capability_framework.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_off00006f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37 5652 bytes
SHA-256: 8bd5150a1d03c80f0a1a9d38f5026330de4f43a430c90fe0fbee756181c789b1
font_01_sfnt_off0000825f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825F 10096 bytes
SHA-256: c4d92e654a090a7d70db0840ab05451c71c327fbbe528886a201144bcc6d21bb

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