PDF malware analysis — malicious · f7c5ea7fdd2c82a8

MALICIOUS

PDF

54.5 KB Created: 2020-08-31 05:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bd552120180e580c89e85a66bda3fe66 SHA-1: ae6f7cbcad8fd7e0c6f85a65833d5d4476a9a2ba SHA-256: f7c5ea7fdd2c82a845951e82caa4a59ab43866add1341497c7358582bad4c21b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One prominent link, 'https://ttraff.ru/wix?keyword=monster+hunter+x+usa', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/wix?keyword=monster+hunter+x+usa
- https://static.usrfiles.com/ugd/912de2_2a511f83bef348b1a7ce2408130c9aa1.pdf
- https://static.usrfiles.com/ugd/b8c837_5dc92c6212214c899a1e276f0a8fa8fb.pdf
- https://static.usrfiles.com/ugd/de65f7_ea19e3820492467e887ad85132c5de26.pdf
- https://static.usrfiles.com/ugd/f1d680_9dae49a42e2546f0b9c45a522f4c2529.pdf
- https://static.usrfiles.com/ugd/b8c837_a6b1f197b51947cfb8d0d19ce9cda23c.pdf
- https://cdn.shopify.com/s/files/1/0434/1520/8085/files/dadigodovenabuxabuxodir.pdf
- https://cdn.shopify.com/s/files/1/0433/9410/5509/files/wojomeze.pdf
- https://cdn.shopify.com/s/files/1/0439/1046/3643/files/radarscope_3._7_apk.pdf
- https://cdn.shopify.com/s/files/1/0435/1731/3178/files/counting_worksheets_for_first_grade.pdf
- https://cdn.shopify.com/s/files/1/0437/7808/0919/files/vezajakulijazudat.pdf
- https://static.usrfiles.com/ugd/73cb9e_f3bb0d22b2964f49b9529f793325818c.pdf
- https://static.usrfiles.com/ugd/d2cc1f_0f546505430a4212a3f9491c22370593.pdf
- https://static.usrfiles.com/ugd/105a8c_077a784f89af4480ab41c08e915b907c.pdf
- https://static.usrfiles.com/ugd/b8c837_49aec9fce2f141f186f63bb2d1b46d0f.pdf
- https://static.usrfiles.com/ugd/b8c837_08b7e61acb7943a58bb4d15be473e1be.pdf
- https://static.usrfiles.com/ugd/3bf302_ada7192a5a234e8caac1b62ca020c3dc.pdf
- https://static.usrfiles.com/ugd/a43ec6_ca904e5ae197455e8911177d38034fac.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
`stream_005_off0000a7f8.bin` `d48b095bec250efbed1dcf2b7a154783eb8654d2ba8f25a2101082e1ffc845b6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xA7F8	10952 bytes
`font_00_sfnt_off00008a88.bin` `b55ae30c30f308c25ec153e0786f2af9454bded5d3206518768184ed8c693bee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A88	3676 bytes
`font_01_sfnt_off0000979e.bin` `1120de36294946f9a5902c13b16aee7848cd0286c048e9c9da63374f855a7b32`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x979E	4812 bytes

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