PDF malware analysis — malicious · 9e994766b0a4f3ee

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 08:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b72cea91f99e189bc94120237b6124aa SHA-1: f9f24d8dc931b111a98acc3c4f547869c86ba96d SHA-256: 9e994766b0a4f3ee6fb2b1863a15b0a0a322cdaac2c70597d681cd42039e3945

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=livro+de+paulo+nader+introdu%2525C3%2525A7%2525C3%2525A3o+ao+estudo+do+direito'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily corrupted, contains text that appears to be a book title, suggesting a social engineering lure. The presence of numerous other PDF links, many benign, indicates a link farm strategy, but the primary malicious intent is the redirector.

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.cc/wix?keyword=livro+de+paulo+nader+introdu%2525C3%2525A7%2525C3%2525A3o+ao+estudo+do+direito
- https://static.usrfiles.com/ugd/b8c837_409c019efa9f4aa28a7a617c0d06b294.pdf
- https://static.usrfiles.com/ugd/aef5b7_d1f2a228e003499bbfcb4f89be67d379.pdf
- https://static.usrfiles.com/ugd/b8c837_e0ec9d01b5224ac2b0db595c21313d7c.pdf
- https://static.usrfiles.com/ugd/7041e4_4c93f74a18464b529d845a75aa4fc707.pdf
- https://static.usrfiles.com/ugd/b8c837_594b8dfe8dc34ac1bcaae8dfa4a08d61.pdf
- https://cdn.shopify.com/s/files/1/0427/4572/5094/files/vanogufososo.pdf
- https://cdn.shopify.com/s/files/1/0433/7539/4977/files/51973434506.pdf
- https://cdn.shopify.com/s/files/1/0431/1810/0637/files/modio_xbox_360.pdf
- https://cdn.shopify.com/s/files/1/0435/2956/8408/files/rejesapafilefipabolutane.pdf
- https://cdn.shopify.com/s/files/1/0439/3343/4011/files/zubag.pdf
- https://static.usrfiles.com/ugd/930050_fd9ad4ebd00444aaa4d8b74628d6e68c.pdf
- https://static.usrfiles.com/ugd/ed64d2_0c997850e791406d9a16219702cfc0a6.pdf
- https://static.usrfiles.com/ugd/b8c837_c3627c8100d844888d7e80be0a9117e7.pdf
- https://cdn.shopify.com/s/files/1/0431/4100/5480/files/genedojomofikemusiguxemap.pdf
- https://cdn.shopify.com/s/files/1/0430/3699/9842/files/53531906212.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_off000068db.bin` `0381c3f865cb302d86294653c766a6577e6dca12defc40959c9fac361a374ac2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68DB	5452 bytes
`font_01_sfnt_off00007ae8.bin` `94518f3968611deeb4df0b933205476153d8515e7b7eceb88ae847d371449c23`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AE8	12544 bytes

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