Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb2a12b856a7f7f…

MALICIOUS

PDF

39.9 KB Created: 2020-11-09 13:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b6849780a6da39b05c350ba5e2832ae0 SHA-1: dd3b3e570adb31b8a38266f819857c57a6894c56 SHA-256: 3bb2a12b856a7f7fb5ffbe9f0cd1d3552e637bd735f025de53e586272169992f
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggraff.ru, which is designed to lead users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user into clicking it. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

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://ggtraff.ru/aws?keyword=algebra+concepts+and+applications+answers+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f8ec043bdcdf.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/nuxepiduded/rilipilitupuvojewumutop.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/pelivavuwafonose.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/vonezot.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/91435579692.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/victoria_2_admit_hegemony.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/nuroreruner.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/vojaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/71682367604.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/xelarugabogumapudive.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/10th_english_book_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/quickverse_bible_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c7646a-49bc-4b96-a529-58f12f5cefa4/pewelofagigetapum.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/34052009911.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_off00004d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D38 5416 bytes
SHA-256: 0b295fb7342e1bc23d47a1ea2e336c64083cf846fb98ac2acb9aaa4ccf32081f
font_01_sfnt_off00005fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 10752 bytes
SHA-256: 4c43e01e6618619d95ca9660f918353a659630f404258079bde0f0acb2923e8a
font_02_sfnt_off0000845a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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