PDF malware analysis — malicious · 5ab2a73b1c667def

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 13:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 42431210d41923a35d460361fb1593dd SHA-1: 91cf8d1bfb8323d90099d48c07f9c7565b86efc2 SHA-256: 5ab2a73b1c667defc4838c3f66ff09d330b79a4e00d643ecf7b7ca31d686efc6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is likely used to direct users to further malicious content. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly unrelated documents.

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.com/wix?keyword=suma+y+resta+de+vectores+fisica
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_0cbffd95719a48abb4eb29ecff715736.pdf
- https://static.usrfiles.com/ugd/b8c837_15d987383e264efbaaf12855d5cf5ee2.pdf
- https://static.usrfiles.com/ugd/b8c837_a6f240838ca84365b428cf9ff385a940.pdf
- https://static.usrfiles.com/ugd/a771bd_7123588d77f641268513b36ed674ff7f.pdf
- https://static.usrfiles.com/ugd/d7ba0f_60e396b15b764f96a700e3bc6ffadcc0.pdf
- https://static.usrfiles.com/ugd/824332_179f37da3ff94df5858b1758e8859304.pdf
- https://static.usrfiles.com/ugd/40b9e6_c0a8f884146840e0868d4e29d4bf74c2.pdf
- https://static.usrfiles.com/ugd/34e21e_6486c075b40c4dfdbca11b97f5cd1a8a.pdf
- https://static.usrfiles.com/ugd/b8c837_8fbb4db14bcf4200b898f6145b9b1716.pdf
- https://static.usrfiles.com/ugd/b8c837_935f39ae9fc64dfdafd45904ef9bd08c.pdf
- https://static.usrfiles.com/ugd/f96b02_89be0f8206a34938be6020f5c4e840b6.pdf
- https://static.usrfiles.com/ugd/b8c837_bbbf0d3f14394fbb96d46ad2b79530c3.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_off00005c8d.bin` `b81487e92ec757173a47784d184bff2d9fe606eb7ef8169e7d5ebb07c04d848a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C8D	5400 bytes
`font_01_sfnt_off00006ed9.bin` `bcec89e24560a7b9a534d1320ab64d77805154c781de96d6c2c0e81361f2818a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ED9	11360 bytes

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