PDF malware analysis — malicious · 0705f8fe9a9b0353

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 05:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 864029be74a58e3d0d860895e8e7806e SHA-1: c16c0bd28ded5c102b89f2f3836100cf548c36d6 SHA-256: 0705f8fe9a9b03539a700160e22cd1785d9c3fa1cb9b51b799a5c177b7366697

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'white christmas sheet music', suggesting a lure. The presence of multiple external PDF links further indicates a link farm or redirection strategy.

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=white+christmas+sheet+music+irving+b
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://static.usrfiles.com/ugd/784815_b4820ad8a7e745e08bcbd08f907a44bd.pdf
- https://static.usrfiles.com/ugd/b8c837_4435acaf8f07454098913d9b1539bec5.pdf
- https://static.usrfiles.com/ugd/405339_0fe3b8154b0c46b48e4b6b6339f60baf.pdf
- https://static.usrfiles.com/ugd/b8c837_7499261b048c48148410d7ed21b63506.pdf
- https://static.usrfiles.com/ugd/76156b_bff4656895124ed4b84e8ca899e1075d.pdf
- https://static.usrfiles.com/ugd/b8c837_9fb24b56143f48fe9235d6d03ba7d6b2.pdf
- https://static.usrfiles.com/ugd/3e9e83_2a767b883a6e4338aef6c7225afee3cd.pdf
- https://static.usrfiles.com/ugd/b8c837_ad22e395b6d34194bcdaf4fa36e1432c.pdf
- https://static.usrfiles.com/ugd/b8c837_c0d43d1519814115b32301c81109aad9.pdf
- https://static.usrfiles.com/ugd/9e41f0_8128c87e47354dc482a625ce158d8c10.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005e95.bin` `8e7afef0c8d3be29fd76e03747a7c601fb6f30a633502e02b956e59024f10a92`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E95	5164 bytes
`font_01_sfnt_off0000700b.bin` `711fe09129c4cd89aa8919d92dbc88c8b6f31ee3251dab44889cc88dd1a6f759`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x700B	16336 bytes
`font_02_sfnt_off0000a36d.bin` `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA36D	4324 bytes

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