PDF malware analysis — malicious · 99a7ec61b1fd78fd

MALICIOUS

PDF

92.5 KB Created: 2020-09-09 04:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 365956d7c11e7b395186318dbfbdf807 SHA-1: 78d9881b0d5d9a2ae6a787a6dc382ad71309da9f SHA-256: 99a7ec61b1fd78fd322f7a0000d92b0b484596355485e63ef6a05fbfde77cc87

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.cc/wix?keyword=new+amsterdam+episode+guide+wiki', is presented within the document body, suggesting a social engineering lure related to a TV show guide. The ML classifier also strongly indicated maliciousness. The document is likely designed to redirect users to a malicious site.

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.cc/wix?keyword=new+amsterdam+episode+guide+wiki
- https://static.usrfiles.com/ugd/ade4e6_8cdbef2f5ac545179f009a781d47287d.pdf
- https://static.usrfiles.com/ugd/4ca7f5_6512ed9f0e8945209af8b3521db22bae.pdf
- https://static.usrfiles.com/ugd/2e79a6_b231c1e52f924626b33d6623dfd2f4a7.pdf
- https://static.usrfiles.com/ugd/01d500_ee2254af971b4ad5a665cd4e50415055.pdf
- https://static.usrfiles.com/ugd/87d215_76c6ac4b30aa4aa9980e5be96f9e8adf.pdf
- https://static.usrfiles.com/ugd/b8c837_da61417200a94ceba3db15df1b75b394.pdf
- https://static.usrfiles.com/ugd/912de2_9891d7e05bd046e4be1c2bcc1134411c.pdf
- https://static.usrfiles.com/ugd/3ab5ed_c90e29f57bae406eb437c4feb941cd4a.pdf
- https://static.usrfiles.com/ugd/8127dd_2129bc219261430b88ef2bb75d014221.pdf
- https://static.usrfiles.com/ugd/64f9d2_5a17c4356ff74f34b0b2f03de28dcc59.pdf
- https://static.usrfiles.com/ugd/278743_a49cf2d88ac0450687978044e6d937b9.pdf
- https://static.usrfiles.com/ugd/1e4819_8af895b190a04282a7cf1a82c21a2289.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012442.bin` `e4226485d440cbaa4a9a5e6eb861ba7f8c346745fc17bc2ef680aaa1a20af173`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12442	5372 bytes
`font_01_sfnt_off0001368c.bin` `f009d41c38c9459f60016861a52380eb7e8bade89c8be5906339987af5602dc9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1368C	14640 bytes

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