PDF malware analysis — malicious · 31eb5d2438c4bcf2

MALICIOUS

PDF

52.2 KB Created: 2020-09-01 04:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 05a233f547abd8e0e007eecdf5c588a6 SHA-1: 2750b673261bda31737a987282886dfd4e19aa37 SHA-256: 31eb5d2438c4bcf2775c5bb7afbc876ee97265f9f6ced1b282b69c8989f51ee2

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed for SEO manipulation, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the document's purpose is to drive traffic 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/pify?keyword=building+information+modeling+course+in+pune
- https://static.usrfiles.com/ugd/99a8f2_c2ee0bfc2f6945bf8988ff6dd286adf2.pdf
- https://static.usrfiles.com/ugd/850f07_75f53c9584614596a17e189bbb24a5b0.pdf
- https://static.usrfiles.com/ugd/de02f3_afc20dd509184fabbb17e4150ac21ffc.pdf
- https://static.usrfiles.com/ugd/51c472_27fad2adb8a34eea8b13b76fe9fce277.pdf
- https://static.usrfiles.com/ugd/3ceeb9_8d7c0dbca0254889b8c768e1326b92e0.pdf
- https://static.usrfiles.com/ugd/599f1c_019a23c3fedf45978f18ed11c403a44c.pdf
- https://static.usrfiles.com/ugd/e5412a_819dd4ba867046b6bed102b83ee4cba3.pdf
- https://static.usrfiles.com/ugd/e32576_0a472454f6c64306bca7f5954518249f.pdf
- https://static.usrfiles.com/ugd/b8c837_1e85c6e49114408ead775c710541af4f.pdf
- https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
- https://static.usrfiles.com/ugd/f65175_09697fb35bfd4d20bed1a5301f5aad92.pdf
- https://static.usrfiles.com/ugd/b8c837_436d222b5ad2406e8b732ce8670b9841.pdf
- https://static.usrfiles.com/ugd/e7e4a0_4c3cc8763b1f460697fdeb5c1f938416.pdf
- https://static.usrfiles.com/ugd/ed64d2_09cec6abd10347938a2f01ebc56c87e1.pdf
- https://static.usrfiles.com/ugd/b8c837_854d07ea873f45c381e7c44f16111951.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_off00008c7b.bin` `164c8526d3907b0592f62e5a883a006cf113508a05f62dc65f340360fc46bef3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C7B	5524 bytes
`font_01_sfnt_off00009f38.bin` `2de6c4791889abfb3923a66f044036057d21856e4a9bc13cd52f5af4d09657d0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F38	10648 bytes

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