PDF malware analysis — malicious · 30b4b7bb3750b595

MALICIOUS

PDF

40.1 KB Created: 2020-08-29 22:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c942547e904599a2dcde54c45c12d8da SHA-1: ee8d2d2f30d2894f10c87008ab7f920c3aea5d38 SHA-256: 30b4b7bb3750b595ecad52ff21bc9f3809d20555eb7160300bce0af11642d6d1

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same lure text and URLs found in the heuristics. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring the user to click on a malicious link within the document.

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.club/wix?keyword=fundamentals+of+firefighter+skills+3
- https://static.usrfiles.com/ugd/b8c837_5f2b8e7dab6147c78548b4e5b26f0096.pdf
- https://static.usrfiles.com/ugd/912de2_1a06172a58604aacb29f3f49b87809b2.pdf
- https://static.usrfiles.com/ugd/b8c837_fe9d8082320a4ceab11390cfd2e64385.pdf
- https://static.usrfiles.com/ugd/af0aa9_685b4c0768de4fd891b4d3db7674c21c.pdf
- https://static.usrfiles.com/ugd/c63dba_5e96f65b6b564d04b4e7133d49350bce.pdf
- https://cdn.shopify.com/s/files/1/0440/6909/3541/files/xilimug.pdf
- https://cdn.shopify.com/s/files/1/0435/0961/2712/files/xotub.pdf
- https://cdn.shopify.com/s/files/1/0436/9196/6617/files/netflix_dual_audio_web_series_free.pdf
- https://cdn.shopify.com/s/files/1/0438/0760/4896/files/46644214150.pdf
- https://static.usrfiles.com/ugd/ab0441_c3dcc00ccfaa489f83b9d514055b2bc8.pdf
- https://static.usrfiles.com/ugd/6cf0f5_1be4553ef277412b8cf6cb3881130082.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004fd9.bin` `af0ff618d1a576c1af1cf50e551bd1066f89131dbcc5dacaeb733c2c1d9794e7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4FD9	5388 bytes
`font_01_sfnt_off000061fa.bin` `cc828465ab3f7e81987fb5a16b618c80cf0de468bf3c108368cc41e49f71e656`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61FA	10016 bytes
`font_02_sfnt_off000083ea.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83EA	4324 bytes

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