PDF malware analysis — malicious · 04598f7d15633a7b

MALICIOUS

PDF

46.7 KB Created: 2020-11-05 03:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: df5a0701852df1465ff0b08b9037ae4f SHA-1: 7f38f3ca2ea3be59a03466786effd4b30759304c SHA-256: 04598f7d15633a7b332b27c8c7830055b1f11e286e7fbfc1d74f69fafd31005a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. One prominent link, 'https://ttraff.cc/123?keyword=keurig+b145+officepro+manual', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier 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://ttraff.cc/123?keyword=keurig+b145+officepro+manual
- https://cdn-cms.f-static.net/uploads/4378155/normal_5f8bf55de4c90.pdf
- https://cdn-cms.f-static.net/uploads/4366381/normal_5f873653d74a5.pdf
- https://cdn-cms.f-static.net/uploads/4415742/normal_5f9c34768c20c.pdf
- https://cdn-cms.f-static.net/uploads/4372355/normal_5f97da03d92ca.pdf
- https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/d8ae86b5d1abd83.pdf
- https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/8423123.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jamokaroxoj/37744681486.pdf
- https://s3.amazonaws.com/wekibik/software_project_management_walker_royce.pdf
- https://s3.amazonaws.com/jumedemimo/adjective_exercise_for_class_5.pdf
- https://s3.amazonaws.com/kovilowab/97320344566.pdf
- https://s3.amazonaws.com/waxejajinigafu/mini_harley_davidson_scooters_parts.pdf
- https://s3.amazonaws.com/fifomi/85456627989.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007629.bin` `b1d1f6899a5d28f8fc5ce2cc23eda27adbb9382156c31dd76c571273ff903e05`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7629	5532 bytes
`font_01_sfnt_off00008905.bin` `241cd85fd743ec1d885fdd32b50fe60a1f6aa2f6fb5dd45e8e8aede3ce9d50ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8905	11244 bytes

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