Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2879fc532b7009…

MALICIOUS

PDF

42.3 KB Created: 2020-11-03 11:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1dd543d0d8073389d94983cc199ab285 SHA-1: 2a9f6a3c612957df7f2f3011b125b62c85d2d8d5 SHA-256: 4a2879fc532b700909716ec43ab1479080646ecda925edbb89470a58cb0abbec
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://gettraff.ru/aws?keyword=popular+educational+theories', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=popular+educational+theories In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6101/7283/files/falosabugutojip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8170/2818/files/carson_dellosa_workbooks_104592.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/pumikix.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/usf_health_emergency_medicine_clerkship.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7093/9843/files/bethlehem_presbyterian_church_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4961/9103/files/9464308531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6215/5195/files/indian_education_sherman_alexie_audio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6195/0646/files/tap_tycoon_hack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/nomipopuripozurafofot.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/53161736006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/unblocked_games_whack_your_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/vojolunurebe.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_off00006797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5164 bytes
SHA-256: 3577e32c6c58df05f3df1fba4ddd26a7bd0622e37d852f8e3f2677e298692cf6
font_01_sfnt_off00007919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7919 10460 bytes
SHA-256: d86cb522acd28a1ca023e3b8d56dd26e1e89fb89d147bc579bc637bf3dd8181e

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