PDF malware analysis — malicious · fc567ba8babfad66

MALICIOUS

PDF

52.4 KB Created: 2020-08-30 23:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1e9241883c4ba68f574a28f4b0522898 SHA-1: 494a0518ca439abde7ffd43ff7a055a27aab7b36 SHA-256: fc567ba8babfad668f5a4bf4fd2b3aaf0d566c8875ab729ba245183fa5f8b049

152 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 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to economics, likely intended to trick users into clicking the malicious link for phishing or malware delivery.

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=intermediate+economics+varian
- https://cdn.shopify.com/s/files/1/0432/0408/3869/files/54139120884.pdf
- https://cdn.shopify.com/s/files/1/0437/0196/0854/files/508804726.pdf
- https://cdn.shopify.com/s/files/1/0435/0427/1524/files/10178103045.pdf
- https://cdn.shopify.com/s/files/1/0438/7530/3592/files/fupalugobu.pdf
- https://cdn.shopify.com/s/files/1/0440/0391/7974/files/wonurix.pdf
- https://static.usrfiles.com/ugd/b8c837_9af6a01153da4800bb69aa80a8cf6f5b.pdf
- https://static.usrfiles.com/ugd/e3ed1f_1315b6f472bf4cdc91fc5ae2d26b7248.pdf
- https://static.usrfiles.com/ugd/b8c837_5d995f8dd9fc4b71bd66e35351a8146f.pdf
- https://cdn.shopify.com/s/files/1/0435/6925/0463/files/lesozutomozod.pdf
- https://cdn.shopify.com/s/files/1/0435/5883/0229/files/farmall_cub_manual.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006614.bin` `3415fced427e597489e08dbf3951016044d46b28bd54eb17e2c982b1fe4b052c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6614	11688 bytes
`font_01_sfnt_off00008c24.bin` `04e26f1345f7b04bdf0957a5cf23a37dde8fa4ef27718569c6152bb0836e384b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C24	5048 bytes
`font_02_sfnt_off00009d31.bin` `10f124efa097dfc27081c87d292c8605dd0f17fc0843d0cac2e32a0c750d835d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D31	12232 bytes

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