PDF malware analysis — malicious · a3c8cde9a1d230ea

MALICIOUS

PDF

40.6 KB Created: 2020-08-28 21:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a672e7dcd202d78f6958e16cb71a8c0d SHA-1: d36d61ddf752148f08633d62b388069c039bbe99 SHA-256: a3c8cde9a1d230eadff37a5e61f45d85a9c29cd1c92b6764bc5a972a16dc7fd0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a high number of embedded links. One of these links, 'https://ttraff.cc/wix?keyword=telecommunication+engineering+books', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on 'static.usrfiles.com', suggesting a link farm designed to lure users to malicious content.

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=telecommunication+engineering+books
- https://static.usrfiles.com/ugd/b8c837_bf8204b084274036b0933a571710e5af.pdf
- https://static.usrfiles.com/ugd/b8c837_ed2e180409194f98bff96c534e57243b.pdf
- https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.pdf
- https://static.usrfiles.com/ugd/b8c837_c2922f2e2c864870b739e3a005f8cb08.pdf
- https://static.usrfiles.com/ugd/b8c837_eede28d44e994ed8ba76f8573931113b.pdf
- https://static.usrfiles.com/ugd/b8c837_c26904b176ba4d1dbcdc386cbf40fb12.pdf
- https://static.usrfiles.com/ugd/b8c837_440114f5513f4854b313b69758118795.pdf
- https://static.usrfiles.com/ugd/b8c837_3a681eaa6a8743ada9e2a1290be22c28.pdf
- https://cdn.shopify.com/s/files/1/0431/4077/6093/files/razirijutazemiwufalumedo.pdf
- https://cdn.shopify.com/s/files/1/0432/3137/9624/files/89846515772.pdf
- https://cdn.shopify.com/s/files/1/0441/0497/4488/files/84511369917.pdf
- https://cdn.shopify.com/s/files/1/0430/9227/9445/files/99813919820.pdf
- https://cdn.shopify.com/s/files/1/0440/2728/1558/files/honda_gcv160_repair_manual_free_download.pdf
- https://static.usrfiles.com/ugd/b8c837_218497b50b594ead968c1459b005b99b.pdf
- https://static.usrfiles.com/ugd/b8c837_a6210fa0add848b795733c8bad17d172.pdf
- https://static.usrfiles.com/ugd/b8c837_0e81fd44c89242d781c1bddc7448a2a8.pdf
- https://static.usrfiles.com/ugd/b8c837_2c354ab937614221a690f8e5650ebb8a.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_off00005b9f.bin` `316367e0e4083cfc06700e73507e4e8bdea5ae1071debde55aea902b3dd22b10`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B9F	5272 bytes
`font_01_sfnt_off00006d6f.bin` `9ec858e3a45e363519dfad5c6e3bec4da8d0e192dbfb76e967d603b875c95797`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D6F	12000 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.