PDF malware analysis — malicious · d1b17672aebe67f6

MALICIOUS

PDF

38.3 KB Created: 2020-10-30 03:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: ae867bf5524244011e5838ba216cbfb5 SHA-1: 2c8d73346bbd56e8020ab29124cd2c2116dc0efc SHA-256: d1b17672aebe67f699868cbe3b0cee04faa5195dbd60036360607d8689cd3f5e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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=watch+gantz+perfect+answer In PDF document text
- https://cdn-cms.f-static.net/uploads/4372080/normal_5f8933892792e.pdfIn PDF document text
- https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/6062912.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379987/normal_5f97494bb733a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369907/normal_5f94489c6516d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409813/normal_5f9b69c7a549b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418197/normal_5f96fb27d5ba1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374203/normal_5f8ce1892d3b1.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/mejados/vaxelezejago.pdfIn PDF document text
- https://s3.amazonaws.com/wisuw/development_economics_debraj_ray.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_off00005480.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5480	5400 bytes
SHA-256: `44b8dae07af317b6c011afc12c77305de4f60bd338ccf7141d0f80aa6ef64739`
`font_01_sfnt_off00006700.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6700	11104 bytes
SHA-256: `308f03c0a71f1043c48451dacafc7aa7148514f6ca9a912ba67fcd52bb52a378`

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