PDF malware analysis — malicious · 3c6b2ea4c7df66a4

MALICIOUS

PDF

54.0 KB Created: 2020-08-30 09:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f41469c4377fcc3cf98d8916aa6d05e2 SHA-1: 495633572ce756f7a378b269274c06be780005dc SHA-256: 3c6b2ea4c7df66a41636316664b80b5887702860d8af8b23f7ca7ee23b1d45a9

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of external links, many of which point to a link farm designed for SEO manipulation. One of the primary links, https://ttraff.ru/wix?keyword=jazz+piano+sheet+music+musescore, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection attack.

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.ru/wix?keyword=jazz+piano+sheet+music+musescore
- https://cdn.shopify.com/s/files/1/0429/0406/0071/files/74479440490.pdf
- https://cdn.shopify.com/s/files/1/0437/3004/3041/files/docker_mount_current_directory.pdf
- https://cdn.shopify.com/s/files/1/0430/9798/1089/files/98581292286.pdf
- https://static.usrfiles.com/ugd/0511f5_db48914fec05472da2b5ac4d8f8c05d2.pdf
- https://static.usrfiles.com/ugd/b8c837_ab918a06946b4d48873b31213d183f3a.pdf
- https://static.usrfiles.com/ugd/963627_df9ca15ccb6146b9895956e248dc7314.pdf
- https://static.usrfiles.com/ugd/d55797_4f1796997a374e97a7a9beab939cdedc.pdf
- https://static.usrfiles.com/ugd/b8c837_b141bc19f86a429baf8c81e42b40d6e9.pdf
- https://static.usrfiles.com/ugd/5926b4_b3c61a9b246b4fdcbd8b4198bca6cea0.pdf
- https://static.usrfiles.com/ugd/b8c837_534f01251945428bbf863bea53b52996.pdf
- https://static.usrfiles.com/ugd/b8c837_7441a3265ece4933b0e5a7f46c155c1c.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_off000094c0.bin` `6f2c66c0332ad2949b2b040f03306bc403c66698fd8c54cf3b3794800a3d99d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94C0	5180 bytes
`font_01_sfnt_off0000a634.bin` `509c0d235b6100f378d750984dacd42eeb8ffba4b64c9bc3fe028de21820feca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA634	10976 bytes

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