Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee830fe33c6e02df…

MALICIOUS

PDF

45.3 KB Created: 2020-10-29 13:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ecbfba0c357cd922262b90f943fabd2e SHA-1: b6c4b381c5e3a3a3af76c4256c5af296eeeba1f3 SHA-256: ee830fe33c6e02df0cf12c335587521e038342246e5906acaa99c97ca348faf5
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of a malicious URL indicates an attempt to lead the user to a compromised site.

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://gettraff.ru/aws?keyword=unfair+mario+unblocked+games+4+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f9087683f8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5f8f963029689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5f9a169841a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f890525ad613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f8d1a7d72d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8753eedb9d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5f8f2950287b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f8f5f238e0c5.pdfIn 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/napejaxosinages/air_pollution_project_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/ulcerative_colitis_diet_plan_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/marriott_discount_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/zamomotad.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/pdf_to_word_converter_offline_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/53207551438.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/15423717660.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/nbme_surgery_shelf_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/digital_electronics_projects_using_flip_flops.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/57796490565.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/44765591625.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/adam_crabb_singer.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/papejalute.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/bobbin_lace_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/5700794149.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_off000060ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 5520 bytes
SHA-256: 035bd12b46138e7c78c932f1958401d017fd88ba18c7b030934254717f08373f
font_01_sfnt_off00007339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 11340 bytes
SHA-256: c0740018d6a587a6a507585a815379cfa102cb5460fae369108428888eb97d88
font_02_sfnt_off0000995a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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