PDF malware analysis — malicious · 00145251c9f108af

MALICIOUS

PDF

34.2 KB Created: 2020-11-05 17:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 90e6004d4a2c11ae430f90dc9d7b186f SHA-1: 9826429cc512fdbcd1b7fdf14e1ef337fa710a4f SHA-256: 00145251c9f108af7605793dd38eb9c75724fa6703f5d7957224a7781bac69cb

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL `https://traffine.ru/123?keyword=words+that+start+with+suba` is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site. No scripts were extracted, and the document body was heavily obfuscated, making further analysis of its specific lure difficult.

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://traffine.ru/123?keyword=words+that+start+with+suba In PDF document text
- https://cdn-cms.f-static.net/uploads/4367644/normal_5f95e3002e966.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365580/normal_5f87465669afd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370054/normal_5f974b0168fbd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421224/normal_5fa297e4432bb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370987/normal_5f890a0aa8fb6.pdfIn PDF document text
- https://jesakejijubew.weebly.com/uploads/1/3/4/5/134577011/455740b69972ce.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369163/normal_5f88a5a97cb1a.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/kibavutibeved/tawigetetaguma.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/14097969620.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b7d18c94-0228-468f-9cb0-6592dee170bf/personnages_dont_starve.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_off0000481c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x481C	5124 bytes
SHA-256: `5f6b9d3160497566fef3b84a38461d532aec2debda04fe991518b48335ce8b06`
`font_01_sfnt_off00005996.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5996	10244 bytes
SHA-256: `a7778debbabdd54d9cc261698d5989403f0aadee75a3864fe4a14a05a55d29a5`

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