PDF malware analysis — malicious · dbc92805d7e46d06

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 10:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ae1c87c9a3093027630bb0dc85246c5d SHA-1: 7ed3c228be14409354dfa7884619419419af6961 SHA-256: dbc92805d7e46d06b3d5010a8484840d0297b8a635affda09d4345b4d8960082

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download for 'Black Desert Online SEA'. The document body, though heavily obfuscated, contains the target URL. The PDF also features a link farm pointing to numerous other PDFs hosted on static.usrfiles.com, suggesting a coordinated effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=black+desert+online+sea+free
- https://static.usrfiles.com/ugd/b8c837_c4815c83b5ea43cca81076e6b930a981.pdf
- https://static.usrfiles.com/ugd/fdee49_5965abb1cdc842da83829d0a23bba24e.pdf
- https://static.usrfiles.com/ugd/c1615c_92af721235314f2fb5f7949e241d9cf3.pdf
- https://static.usrfiles.com/ugd/9c43ec_f65a09c7d9e74c89b994b9bdb3e44751.pdf
- https://static.usrfiles.com/ugd/b8c837_020fe300be4e4cbbadafe8ae2b3033d0.pdf
- https://static.usrfiles.com/ugd/b8c837_e43635ec5705449cb025bf6588570ddf.pdf
- https://static.usrfiles.com/ugd/e3c460_ebf7ff6cddc84d58a61fd8503c6c5672.pdf
- https://static.usrfiles.com/ugd/21a131_da18e4adfaf24c2795b2adac9d48cd4e.pdf
- https://static.usrfiles.com/ugd/45fd81_ced4b7ba887a4f06bc973841d5f3dd9f.pdf
- https://static.usrfiles.com/ugd/b8c837_b78163a9bbf3495c8c4378ef908fa1d9.pdf
- https://cdn.shopify.com/s/files/1/0431/6623/6826/files/zudidorurokodivowe.pdf
- https://cdn.shopify.com/s/files/1/0427/6636/8935/files/star_wars_action_figures_price_guide_2015.pdf
- https://cdn.shopify.com/s/files/1/0432/4196/3679/files/zineravadut.pdf
- https://cdn.shopify.com/s/files/1/0429/9846/4661/files/10868080309.pdf
- https://cdn.shopify.com/s/files/1/0428/8937/9993/files/pocket_gods_episode_10.pdf
- https://cdn.shopify.com/s/files/1/0448/5762/2689/files/serway_vuille_college_physics_8th_edition.pdf
- https://cdn.shopify.com/s/files/1/0431/4244/7265/files/biwidufeboxamenezexela.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_off000061a1.bin` `83556293091e255d1621ecf5ffe4358b2304004ce86cfae3fcdd72f1e57c43d5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A1	5128 bytes
`font_01_sfnt_off0000731f.bin` `ab93d09b0792fbabfa826a6d9cfa072432bc5ad060a1fd28e8610da31c665ec1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x731F	9876 bytes

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