PDF malware analysis — malicious · 4d9503ba6ca868c9

MALICIOUS

PDF

40.2 KB Created: 2020-09-01 01:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c268c062dd1f34f854b7329226dc8702 SHA-1: d240c2e1fddb7d816e9bfc4a80dfa1dc156caf93 SHA-256: 4d9503ba6ca868c9238eb92ec650b3624f60d08f42f2a19fb9fcece7c578fde5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files, creating a link farm. One of the primary links directs to a known malicious redirector, ttraff.com, disguised as a wallpaper download. This suggests the document's purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=best+hd+lock+screen+wallpapers+for+android
- https://cdn.shopify.com/s/files/1/0438/6239/2992/files/negudag.pdf
- https://cdn.shopify.com/s/files/1/0448/1240/2839/files/modixubarolanu.pdf
- https://cdn.shopify.com/s/files/1/0439/4264/1832/files/89226047616.pdf
- https://cdn.shopify.com/s/files/1/0430/6557/3537/files/modern_calligraphy_tutorial.pdf
- https://static.usrfiles.com/ugd/bfbc46_2b28994972c44f6db362a61cc5c77f1a.pdf
- https://static.usrfiles.com/ugd/b8c837_200f101cabbe4a129bb2dcbd3e110874.pdf
- https://static.usrfiles.com/ugd/b8c837_50d717412911452c9e850a5bb5fc6dc9.pdf
- https://static.usrfiles.com/ugd/b8c837_11db2222ef77485abd0fab85b8fdd4a1.pdf
- https://static.usrfiles.com/ugd/cafc24_5c417be6d2d047a7b376fdc6f48f5713.pdf
- https://static.usrfiles.com/ugd/bf650e_53d4add1b3054f3a99f489828dffcf04.pdf
- https://static.usrfiles.com/ugd/c068f8_7923b58ae90845c6a13658b13c2d3046.pdf
- https://static.usrfiles.com/ugd/9757e7_5d1eca7ff8674415a29d257e1c34002e.pdf
- https://static.usrfiles.com/ugd/5e8de6_5f1211d27342498a806908851fe1032a.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_off00005fe4.bin` `f1944f9ed798a772a9ff4d6dc6da819520312104eed9b89fa4b190966e4f219a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FE4	5448 bytes
`font_01_sfnt_off0000727e.bin` `42b4c005e03d87c1daa6c6abe6633875eb690dbeb33f75563f73df1406b20e41`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x727E	9904 bytes

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