PDF malware analysis — malicious · 416988e32392b159

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 19:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ad8a8d7608c2360b9253cdbac5ef5962 SHA-1: d28d52891daf96de32ef567ffe430062a048092b SHA-256: 416988e32392b15976e6de4c4f0668cb5f46612007a43f04e4e178b60b63e25e

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 search result for "anatomy physiology of heart pdf". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the target URL and text, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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=anatomy+physiology+of+heart+pdf
- https://static.usrfiles.com/ugd/b8c837_059c75bd1f784c759520fbf3d2df20cb.pdf
- https://static.usrfiles.com/ugd/7d21c0_a8c2c05b9a2d46399807671ce99f51f6.pdf
- https://static.usrfiles.com/ugd/b8c837_6e4edeb7eac9486495861ed7cc940004.pdf
- https://static.usrfiles.com/ugd/0a052f_5b77caf401604c468e76332ca37a1e64.pdf
- https://static.usrfiles.com/ugd/b8c837_58c0e2677d264bdfb97c9b6145d5f366.pdf
- https://static.usrfiles.com/ugd/b8c837_714e4135be8f4c96a179b8141231f395.pdf
- https://static.usrfiles.com/ugd/ab0441_8d42e0273d374fac9eac03f3e1de232f.pdf
- https://static.usrfiles.com/ugd/6df952_464b299b715342f39117e400727f4d5b.pdf
- https://static.usrfiles.com/ugd/b8c837_84dfa9865e85450687918c08311d7f92.pdf
- https://static.usrfiles.com/ugd/b8c837_d757f9cded0e4b08a6758a3d5a52a81b.pdf
- https://static.usrfiles.com/ugd/b8c837_82e8055f5a22495692bf1ad55f98445c.pdf
- https://static.usrfiles.com/ugd/b8c837_98fc5aa7399b4310be49e70d6ba902a8.pdf
- https://static.usrfiles.com/ugd/b8c837_97ae035b272045479be49a6e15ce87e1.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_off00006244.bin` `569fd1b69876e8830ca67290809eff089d60589509fe8fbdfe4c52926e7ff700`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6244	5544 bytes
`font_01_sfnt_off00007501.bin` `fcb5f02e2274422952e33872bb1c7a98973d00405141f577e1c1079e14b8eb97`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7501	10784 bytes

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