PDF malware analysis — malicious · 66b3bcc8ebfe12c5

MALICIOUS

PDF

66.0 KB Created: 2020-11-25 22:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 4aa12020d3a24e5759a3dd6ab2248a16 SHA-1: ecbe53492c4897bc1a50124f9c73690aaa0079f2 SHA-256: 66b3bcc8ebfe12c57586e3c5ab0795cab1ca8c06940bd5098c9798bad7e4179b

154 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://traffking.ru/strik?utm_term=aztec+princess+tattoo'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9896

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://traffking.ru/strik?utm_term=aztec+princess+tattoo In PDF document text
- https://cdn-cms.f-static.net/uploads/4383679/normal_5fab033e4e750.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470833/normal_5fad4caea6a29.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390382/normal_5f9ebe185e143.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379374/normal_5faf7fb2ad05d.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/felasorarabipis/adverbs_modifying_adjectives_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/visagogijulep/15616507195.pdfIn PDF document text
- https://s3.amazonaws.com/punurum/pixel_battle_royale_unblocked_76_google_sites.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4aa3bcb8-ad72-4fb7-b6e5-a8846d682bbd/windwalker_monk_pvp_talent_guide.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_off0000c925.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC925	4936 bytes
SHA-256: `c9dc41dd27f2ea3a6330da2d42c829f5dadf102a7967a5dc1fe9ccd84292e64e`
`font_01_sfnt_off0000da03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA03	9884 bytes
SHA-256: `e6478c5c2dae9463a702daed579a87961bf9b58ef4262b06c2263809bae6888f`

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