PDF malware analysis — malicious · b776507a25e442d9

MALICIOUS

PDF

79.7 KB Created: 2020-12-26 05:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 7bf7e29e116126a3dd6ac49d74849924 SHA-1: 2b60e0faf2ec0b3c6f4275f2686695f40c25e3cf SHA-256: b776507a25e442d9600b68d5ee1ed7e418533f6f8857729d99a211d0eabfa076

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=connect+a+plug+puzzle+game+free In PDF document text
- https://cdn-cms.f-static.net/uploads/4375203/normal_5fa3dc5fb54e1.pdfIn PDF document text
- https://cdn.sqhk.co/gotubosif/hjnXx1a/should_i_answer_app_iphone.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385863/normal_5fe0df347bd7b.pdfIn PDF document text
- https://cdn.sqhk.co/netesatova/icKwhga/58792171678.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366384/normal_5fbc3e29b0392.pdfIn PDF document text
- https://cdn.sqhk.co/momujolo/PmghUgf/universe_sandbox_2_free_play.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392199/normal_5fc6d9bc92b63.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365636/normal_5fd779f4b47b5.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/cdc80d15-360c-433f-ac84-03d6c24dab6f/26438699250.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d411f0b6-d918-48db-8fee-e74499de53c1/pilgrim_cove_camp.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/rufasazi.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_off0000fcdd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCDD	5112 bytes
SHA-256: `d09e6693167b07f1c4084a7ecf7b2590234539c2e57bd21094eb2130f58be1c0`
`font_01_sfnt_off00010e38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E38	10560 bytes
SHA-256: `2d6b562acbc08301b1210528c8eae664518884616b76a541f8459c079be5bc0a`

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