PDF malware analysis — malicious · 570e2a90df9b5f71

MALICIOUS

PDF

45.9 KB Created: 2020-09-06 00:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: af27fa4cf3381d1601631893d824ee91 SHA-1: 6716687bd84755310ded9ee8284bb97ff09aec85 SHA-256: 570e2a90df9b5f713509abb3a5362beb0399fdca3ff504e806ef382624d28705

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.me/wix?keyword=game+controller+for+android+phone+ebay, which is likely used to lure victims. The document body, though heavily obfuscated, also contains this URL and other links pointing to static.usrfiles.com, which hosts numerous PDFs. The ML classifier strongly supports the malicious verdict.

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.me/wix?keyword=game+controller+for+android+phone+ebay
- https://static.usrfiles.com/ugd/682d1c_de77477f3a8e4c40a21e3164f7d81704.pdf
- https://static.usrfiles.com/ugd/67f5f7_ddc6fed045f445e6a2a457e87eb60b3b.pdf
- https://static.usrfiles.com/ugd/79e0dc_5a524d27b1844ef8bde31146e2c7b840.pdf
- https://static.usrfiles.com/ugd/2813e2_ad5ac4533c864312938e4632cce2e301.pdf
- https://static.usrfiles.com/ugd/d3758e_c749d4ebafc84cc5819ead49e66e2036.pdf
- https://static.usrfiles.com/ugd/5bb01c_bdab9906f836431a89c8ab72f1ac0fc4.pdf
- https://static.usrfiles.com/ugd/694d5d_3ce9918e60314c408a20401d950766cd.pdf
- https://static.usrfiles.com/ugd/f08e01_05f08a53112447fa8221554cffdd6683.pdf
- https://static.usrfiles.com/ugd/5c9621_91b13502c6ae4e49aa0b133c3dec001e.pdf
- https://static.usrfiles.com/ugd/e3834b_80007ac810af441e885cd8cd1656378c.pdf
- https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
- https://static.usrfiles.com/ugd/a72fa8_4458718317a8463aa8304eeb817a0735.pdf
- https://static.usrfiles.com/ugd/27135d_ff8d6ab9f53441cdb65269ebdfb536b5.pdf
- https://static.usrfiles.com/ugd/5b9a87_5de4b6a539e9454c9787c78b2354d44c.pdf
- https://static.usrfiles.com/ugd/8b97dd_eb9af9349d054a5fa06890699f92518d.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_off00007428.bin` `46da90d1dcbf57cf486e57d34571f04a42f47a53c259765cd0a891849a444ef4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7428	5488 bytes
`font_01_sfnt_off000086ae.bin` `a7a09bc5876f130a753ad7e1dc619f9efc169a3f50aea28f0fc4275d970e7398`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86AE	10300 bytes

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