PDF malware analysis — malicious · db1eaec0ef2638ca

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 14:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ac2020dd4cd19556e7398bd7d42ad426 SHA-1: 98d8185623229e25fef80877d1300fd8da69180a SHA-256: db1eaec0ef2638cacb6282a82838b163a2a39a8394727bf313a5e0ff043d2ca1

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/pify?keyword=definition+of+verbal+communication+pdf'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking the link. The presence of a large number of external PDF links, many pointing to Shopify domains, further indicates a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=definition+of+verbal+communication+pdf
- https://cdn.shopify.com/s/files/1/0428/3292/0732/files/pigubulodunobovorififibu.pdf
- https://cdn.shopify.com/s/files/1/0436/7322/3321/files/cc_camera_app.pdf
- https://cdn.shopify.com/s/files/1/0433/3171/5225/files/arterial_line_waveform_tamponade.pdf
- https://cdn.shopify.com/s/files/1/0430/1117/8649/files/valve_actuating_mechanism.pdf
- https://cdn.shopify.com/s/files/1/0435/7432/9507/files/womubavez.pdf
- https://static.usrfiles.com/ugd/5fd5c1_4873841d2e9f458bac41da8645e063dd.pdf
- https://static.usrfiles.com/ugd/b8c837_cda46ba4730747419bd7f9e1bb3a2070.pdf
- https://static.usrfiles.com/ugd/7ff653_9a75cf97c0224d92942c1da7d9121ab5.pdf
- https://static.usrfiles.com/ugd/c33cdb_1e58d28c495a412bb756760216489d09.pdf
- https://static.usrfiles.com/ugd/ba3095_8e69e91fa5bd48d5862b0e26883b8d3d.pdf
- https://static.usrfiles.com/ugd/fe83c3_f9ed2263ec884fe0a7c863ba93e9cbba.pdf
- https://static.usrfiles.com/ugd/b8c837_a09f5b5b2e9a40a9b961d2cdf6138654.pdf
- https://static.usrfiles.com/ugd/96bf9d_1c1e0de0c4144600b19843132a0b0ccc.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_off000067e7.bin` `c99cedbd1b120cd58cc198f8afa1e98f595080bccaf27363b89482d00585b2d6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67E7	5204 bytes
`font_01_sfnt_off00007981.bin` `e87643d4118a1b6fc49d2c713c24d94459221618bb1c0747526ebed9ecf30ced`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7981	9984 bytes
`font_02_sfnt_off00009b9a.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B9A	4324 bytes

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