PDF malware analysis — malicious · 65d2baade1a0afa2

MALICIOUS

PDF

35.4 KB Created: 2020-09-06 00:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a4821b8b080ae2921ba51a50b6207ede SHA-1: 6e3694b92b3793211b33b42fcaae0f8a6aff4c45 SHA-256: 65d2baade1a0afa25ad984e73736e7d4aad9ec61fb23c99fa86d0d57b0fca834

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including one to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to a user guide and the malicious URL, suggesting a lure for SEO poisoning or phishing. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links points to a link farm 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.me/wix?keyword=crestron+mercury+user+guide+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://static.usrfiles.com/ugd/544c7e_41619b9ba07f4862b4a59cb8ba0ac528.pdf
- https://static.usrfiles.com/ugd/8b4172_01e8e6db72994740a6fde0552638d1a2.pdf
- https://static.usrfiles.com/ugd/1b7c00_50bcfac3fcfb4d21a44e94087f2d49ce.pdf
- https://static.usrfiles.com/ugd/1d64af_87043035d6334c6e9cf3f00f891bb735.pdf
- https://static.usrfiles.com/ugd/2ca09c_06bfea611e7b4fe9aaa0e84e1bf559cb.pdf
- https://static.usrfiles.com/ugd/b8c837_4950e941ebea4572b77eaad6d11f2c47.pdf
- https://static.usrfiles.com/ugd/cbe325_e24d243b8a294328837db9838cc83eff.pdf
- https://static.usrfiles.com/ugd/6da380_456a8c52edb04cdc9025c253d7344184.pdf
- https://static.usrfiles.com/ugd/b8c837_72dca2aab43849c2831309232ee23de5.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_off0000408e.bin` `3e11f5c5e1e59e293f4f50a1c0cb13dc26dc667e821acea568e57b72ab6608d9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x408E	5240 bytes
`font_01_sfnt_off00005254.bin` `2a97528885fb6527205770b4056947cf4b4b6beaf605d2653faca0c85034557a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5254	9556 bytes
`font_02_sfnt_off00007305.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7305	4324 bytes

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