Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3072a47208bc28d…

MALICIOUS

PDF

42.9 KB Created: 2020-10-31 15:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 47521d2d3e035cd9ad68b95e84447df6 SHA-1: 71cb37c886026a08b266b6cf6ca51748f9d4ae23 SHA-256: b3072a47208bc28d94e4d924f1501e067ec137c848f2c2ea45a07f46f3db98ce
102 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 'https://gettraff.ru/123?keyword=doncaster+college+blackboard'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=doncaster+college+blackboard In PDF document text
    • https://xedutogozazinar.weebly.com/uploads/1/3/4/5/134505586/wefawuju.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/fcf69ca7ff.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/gizewuripena-xitipi.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/e46bc4f9-4889-415d-a391-fe855bc2f4be/18363737092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676bf331-05d5-4f6a-922c-4aa929a0e6dc/94451542571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f340aacc-f063-4992-bd50-f1f517062277/limonomowupolizibite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f9ca138-498c-4545-bc88-ebe1115b9781/79828318722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a8f0b8-7882-4bc8-a966-e2157c191dcc/manual_de_html5_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/kulimivajuta.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/lakikuronaki.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/58233715100.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_off0000699b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 5308 bytes
SHA-256: b0f91aab4ca4329c54419f58c70b51b0e7a217b33f0223d74d5d67b4245dd471
font_01_sfnt_off00007bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBA 10552 bytes
SHA-256: 1c4697ec20581a9546fef20271b6fa40572cb4d24629151be44a0c21587aeb46

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