PDF malware analysis — malicious · 16ef01c1e5c3aa56

MALICIOUS

PDF

39.6 KB Created: 2020-09-02 06:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 204479a2939ac988d4447922b49e2781 SHA-1: b0b7fe425548d3e84e2255c5c9d46c703976a1e9 SHA-256: 16ef01c1e5c3aa569863e450a7473c7d515b487a97b451effc47f2663b2ccc18

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to malicious content. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or redirection scheme.

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.ru/wix?keyword=aerial+hoop+lyra+performance
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/7286/3899/files/8295355106.pdf
- https://cdn.shopify.com/s/files/1/0430/3290/3833/files/88967805084.pdf
- https://cdn.shopify.com/s/files/1/0457/3688/6428/files/lagu_cinta_berbunga_rindu.pdf
- https://cdn.shopify.com/s/files/1/0429/1218/6531/files/menakeb.pdf
- https://cdn.shopify.com/s/files/1/0441/2204/6616/files/company_profile_word_template_microsoft.pdf
- https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.pdf
- https://static.usrfiles.com/ugd/77941b_ecfd02299a1849f8bc2e6f5866841cba.pdf
- https://static.usrfiles.com/ugd/b8c837_abebc3777b5b4a4f8867a1f155e4821f.pdf
- https://static.usrfiles.com/ugd/b8c837_4f4fad99df694fcabbcc53da8f491fd4.pdf
- https://static.usrfiles.com/ugd/74e905_1718f3a5003e42ddbe14b89893fe3ab2.pdf
- https://static.usrfiles.com/ugd/b8c837_81d893d104914a2687a9c730930d7f40.pdf
- https://static.usrfiles.com/ugd/9e53d4_0befb644251c4b38a1afc7138855321e.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_off00005e21.bin` `ba82908046138cba27c3ef16f389992160df194e125a9ad70cded75c5b336c85`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E21	5168 bytes
`font_01_sfnt_off00006f97.bin` `9fe1ff877c76a24147ffc887522f15e64d1e1d481b8ac2d72a14f6a83e301c9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F97	10120 bytes

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