PDF malware analysis — malicious · d28d37fc6cec9079

MALICIOUS

PDF

119.3 KB Created: 2020-08-31 03:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 28407c7633b611e6c9ea6dd107632099 SHA-1: 4b77abe275ef4d74d3d1df6a53806d52e9077063 SHA-256: d28d37fc6cec907934db0ec5ba39c3366fecd755ed39f4a9308dfa2b0340fbb5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=malibu+low+voltage+transformer+troubleshooting'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious.

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=malibu+low+voltage+transformer+troubleshooting
- https://static.usrfiles.com/ugd/de02f3_82f2365173e24f7c83de6b962405fcf2.pdf
- https://static.usrfiles.com/ugd/b4609a_dc6a712d247d4ca7b3dfa79d6e44fb7f.pdf
- https://static.usrfiles.com/ugd/91e123_28330e44dd10464692258c5f1ad8b7bd.pdf
- https://static.usrfiles.com/ugd/b8c837_3c858a73eb3447a9b3c756bf73a9a67f.pdf
- https://static.usrfiles.com/ugd/d2cc1f_9757897666f04a0a8eb5245b1903bf23.pdf
- https://static.usrfiles.com/ugd/eb4c03_0023b0936f1f4c0487221248431b06cf.pdf
- https://static.usrfiles.com/ugd/7ea8bb_ff816011f1d14d1cbf44e780ed85c7a4.pdf
- https://static.usrfiles.com/ugd/26481d_1060d7d385584b748e8e60ade603c09f.pdf
- https://cdn.shopify.com/s/files/1/0434/6154/2054/files/minecraft_superheroes_server.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
- https://cdn.shopify.com/s/files/1/0430/7887/7337/files/risk_of_rain_2_skins.pdf
- https://cdn.shopify.com/s/files/1/0432/8400/5032/files/62465735025.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_off00018d58.bin` `6c9cadc100d2d047406ffb7a1252af66cf9bdf07b7873c49b00f515b51ecd8a8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18D58	5476 bytes
`font_01_sfnt_off00019fe4.bin` `bc2ad5dc12d3c5351dd29b92bf3c44b30103d6302afe1da109c1be7b90db4578`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19FE4	15356 bytes

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