PDF malware analysis — malicious · a517cf91d9002366

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 11:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e21743b94c33bcea38e2cee565c0f37 SHA-1: 9b2c31f9afd23f46440758dc1d98dad6dc876bfd SHA-256: a517cf91d90023663eec111c63c9879d812bc6fd49da211c4ca36db8d9c9e828

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, https://ttraff.ru/wix?keyword=jail+time+for+aggravated+assault+wit, is flagged as a malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated.

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=jail+time+for+aggravated+assault+wit
- https://static.usrfiles.com/ugd/05900a_897928ab96e6491ab8cd2cef666b76db.pdf
- https://static.usrfiles.com/ugd/b8c837_c69011b469df45fc8f67f5be9037acaf.pdf
- https://static.usrfiles.com/ugd/136d07_876301a01249453e8f12b41a667646cd.pdf
- https://static.usrfiles.com/ugd/eaf48f_f2fbf9cd1273472690a14f14aa760e9a.pdf
- https://static.usrfiles.com/ugd/b8c837_08b91a96f3c442e09092f9c64505cbca.pdf
- https://static.usrfiles.com/ugd/b8c837_3d82d46828234bcc8de5d7a7848bcd02.pdf
- https://static.usrfiles.com/ugd/b8c837_4cea11174dbc44afa9a07ec8658a7a10.pdf
- https://static.usrfiles.com/ugd/b8c837_9c5f60f4ae5f4bd284098d999c42e049.pdf
- https://cdn.shopify.com/s/files/1/0429/5426/0643/files/22752792973.pdf
- https://cdn.shopify.com/s/files/1/0438/4600/8982/files/inheritance_cycle.pdf
- https://static.usrfiles.com/ugd/b8c837_428cec0b543d4fd7a34cd88414831e33.pdf
- https://static.usrfiles.com/ugd/3e0cb9_ae1ea0bc07ae4e84b9948cb2f9607d23.pdf
- https://static.usrfiles.com/ugd/19ce5d_21e5ce929a6d49efaa3ced788cd5a506.pdf
- https://static.usrfiles.com/ugd/0d002d_322a23958f2c45f78a6a2064bd544453.pdf
- https://static.usrfiles.com/ugd/10a4aa_65368bf1be234ab7aaa4b48ab134b451.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_off00007624.bin` `af8b48e8526f92170c0b2ceab422e0fb2173626975d338f7adf57c31428d9471`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7624	5368 bytes
`font_01_sfnt_off00008865.bin` `2c04fe648c767a2b266fb2249380cdfab2e756fec59a8aaf4a4048add97e845b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8865	10012 bytes

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