Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63a0e4696ad3f22…

MALICIOUS

PDF

44.6 KB Created: 2020-11-05 12:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3bfbee4463e42ded192ff3bb05751f32 SHA-1: d4dd8e2ab2ce2533719920455d5c67b0fe75dec0 SHA-256: e63a0e4696ad3f22f7ba553ee0b82280f01e0da4010a088252f06dd26bd9bb31
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 'https://gettraff.ru/strik?keyword=audit+checklist+template+excel'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

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/strik?keyword=audit+checklist+template+excel In PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/4cf41af4.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/873746a1e75.pdfIn PDF document text
    • https://fegixobipe.weebly.com/uploads/1/3/4/4/134467450/6347809.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/waxodo-duguwena-revugoraf-waxogili.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/658d08cc-825a-48ee-bec3-3cbb7f14edab/wirojabiramojomek.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/st_catherine_of_siena_church_norwood_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e2cdb9-9455-41fb-bc15-63f5a5a44e7a/floss_holder_for_braces.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/8th_grade_us_history_staar_study_packet_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5877d5eb-6945-4d62-8e43-77cbfa33b65c/71205866216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428b01ac-32c4-4d7b-9703-e9becffd2384/go_kart_transmission_install.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/exercise_physiology_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/middle_school_reading_comprehension_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2671a59-cd7f-4923-8d17-3c500fe1ba50/22167303729.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/career_paths_electronics_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/25284709785.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_off000071a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 5340 bytes
SHA-256: 5e0f590308449626dec4792bcc5b63f0d3aaf7af624a184353acd8773fe2d0de
font_01_sfnt_off000083a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 9960 bytes
SHA-256: 24e49987954fdafc448c373933707c4abf3a2aa291fa64e5f650a091fd398876

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