PDF malware analysis — malicious · 9de88f723803e7d5

MALICIOUS

PDF

48.0 KB Created: 2020-07-30 13:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9b8b5e0284ca133a4f6286f24796f239 SHA-1: 40136c8425b0f45de9372ba1782e3a4c2128a071 SHA-256: 9de88f723803e7d5c795ce4ba9f6fcea2567d5c0488c31a6009ac5e45afa5973

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.ru`. This URL is part of a link farm designed to trick users into downloading PDFs, as indicated by the `PDF_SEO_LINK_FARM` heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by `wkhtmltopdf`, a tool sometimes used to create malicious documents.

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=applied+cryptography+bruce+schneier+pdf+download
- http://files.iowaaces360.org/uploads/1/3/2/7/132710497/tovulubumafo_pavirododa_vogutudofebavit.pdf
- http://files.stonecutterswsq.com/uploads/1/3/1/4/131437311/vupugukizazal.pdf
- http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
- https://cdn.shopify.com/s/files/1/0431/3631/9639/files/84874126569.pdf
- https://cdn.shopify.com/s/files/1/0431/6558/1468/files/15514292381.pdf
- https://cdn.shopify.com/s/files/1/0432/1797/7504/files/27822708073.pdf
- https://cdn.shopify.com/s/files/1/0435/2806/1087/files/83448048542.pdf
- https://cdn.shopify.com/s/files/1/0432/0349/4043/files/7932953739.pdf
- https://cdn.shopify.com/s/files/1/0433/0727/0312/files/43703131712.pdf
- https://cdn.shopify.com/s/files/1/0434/5040/0928/files/43514089156.pdf
- https://cdn.shopify.com/s/files/1/0431/7764/0093/files/zigegubumebibosatev.pdf
- https://cdn.shopify.com/s/files/1/0432/3062/5950/files/muserubuzowadikoje.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
- https://cdn.shopify.com/s/files/1/0431/3455/0177/files/52377351693.pdf
- https://cdn.shopify.com/s/files/1/0433/6120/6422/files/49140370149.pdf
- https://cdn.shopify.com/s/files/1/0435/4949/1359/files/sajezomovuguxipululapave.pdf
- https://cdn.shopify.com/s/files/1/0432/4560/0936/files/bupijuguw.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_off00007c4f.bin` `35ea04421672fa34276f24bec375c5a066dd3159d9f0c270c02247afe4e2fb35`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C4F	5624 bytes
`font_01_sfnt_off00008f6b.bin` `817d38b5e87b1121275942d0efc5dfad52cdbcf4b6236cc52d5cea8f33de93f2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F6B	10124 bytes

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