Malicious PDF — malware analysis report

Static analysis result for SHA-256 5644160581eae9ac…

MALICIOUS

PDF

34.4 KB Created: 2020-11-05 22:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: de84f3ab0df598ee055eaa71b4bae1c3 SHA-1: 1e3b78ab6f3d8e4c370b49c1901ef06eb1c9d987 SHA-256: 5644160581eae9acdc0c7dd15e7231e102ff7f15fb3d3db0a9fd2ee9a480889c
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

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/123?keyword=monohybrid+cross+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f90e2e25cf4a.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/moxekibupuru/faute_de_mieux_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/sutijenixagorijugimapot.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/building_codes_illustrated.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/learn_japanese_language.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/salient_features_of_academic_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/guvekonozepubug.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rirawoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/ganix.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/lutojajitorupod.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/differences_between_andragogy_and_pedagogy.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/6098481974.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/doripowodemu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kowomepejugovajuwikuzuwan.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_off00004794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4794 5332 bytes
SHA-256: 826fe60a03c63ede260c82ba245be0017d0f1e03d32d51e11faa4fe9cb775447
font_01_sfnt_off000059cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CB 10500 bytes
SHA-256: 2dda928a2924ec2242b77d07fcd1ddedef93803a3458d13bb07e97d6a3c7f7f6

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