PDF malware analysis — malicious · 8a69a307eea72abd

MALICIOUS

PDF

46.2 KB Created: 2020-11-03 00:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 639bdce304167891e8d11d216eeec10c SHA-1: 7ef21168e2bf914648c7d0da19e1c9f9c0dbc68d SHA-256: 8a69a307eea72abde8ad8dbe45a9dcb43c4008be8ffd05e6c0051d61e8a626d6

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://cctraff.ru/strik?keyword=belington+wv+homes+for+sale'. The document body also contains this URL, suggesting it's intended to lure the user to a malicious site under the guise of real estate listings. 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://cctraff.ru/strik?keyword=belington+wv+homes+for+sale In 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/d1c76cec-a819-4875-8b7c-78c2129dfc03/zeramur.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/effective_academic_writing_1_answer_key_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/8410/1790/files/kidney_diseases_symptoms_and_treatment.pdfIn PDF document text
- https://s3.amazonaws.com/defipedibe/5313063452.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/0148/4697/files/multiple_choice_worksheet_7th_grade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/76112682-f7f8-42f5-bc18-12b64f20543f/sobutegefa.pdfIn PDF document text
- https://s3.amazonaws.com/gezetega/misidumuwofibukomamorux.pdfIn PDF document text
- https://s3.amazonaws.com/ditiruz/42265995859.pdfIn PDF document text
- https://s3.amazonaws.com/dinisemowoge/half_succubus_5e.pdfIn PDF document text
- https://s3.amazonaws.com/gupawupigawono/vipafexetid.pdfIn PDF document text
- https://s3.amazonaws.com/jasadavebaga/census_2011_summary_upsc.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007447.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7447	5384 bytes
SHA-256: `96078793e2bc5fdfb5847707a9b0b483644d29ed7d212a6ad71654f79f1589fb`
`font_01_sfnt_off00008686.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8686	11468 bytes
SHA-256: `347b9ba34cb478266ebde933e7ff6fcd7221378aee4ce03c49578e827d9bd3c4`

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