PDF malware analysis — malicious · d11c12c31734cbc5

MALICIOUS

PDF

51.7 KB Created: 2020-07-27 07:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a428e733810c20fd440aae96b26e5b08 SHA-1: 08a5ca7e1cbf02a3e4adf1a2e4e84c9511ace9e0 SHA-256: d11c12c31734cbc5475a46627f9f3688c5a4f12a2d3d8e76b19cbcf1419fa554

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This link is presented within the document body, disguised as a genetics worksheet answer key. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on shopify.com, likely for SEO manipulation to increase visibility. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=genetics+unit+codominance+worksheet+answer+key
- http://files.dglivestock.com/uploads/1/3/1/4/131453256/3675332.pdf
- http://files.crossroadschurch-aurora.org/uploads/1/3/1/4/131437660/33ebd7da38b5fc4.pdf
- http://files.foxxpoolsbycburger.com/uploads/1/3/1/0/131070539/vuxewatuvuv-poralopobavun-mijijo.pdf
- http://files.sosphilly.org/uploads/1/3/1/0/131070146/9063719.pdf
- https://cdn.shopify.com/s/files/1/0432/9114/8444/files/rupepan.pdf
- https://cdn.shopify.com/s/files/1/0433/4485/5195/files/jedovosemexer.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36726725464.pdf
- https://cdn.shopify.com/s/files/1/0430/6662/2105/files/pokepilo.pdf
- https://cdn.shopify.com/s/files/1/0429/8804/4442/files/xowikotesokadof.pdf
- https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wuwubovar.pdf
- https://cdn.shopify.com/s/files/1/0428/0687/0183/files/ziposijekeba.pdf
- https://cdn.shopify.com/s/files/1/0430/8212/1377/files/konukaloridopasinik.pdf
- https://cdn.shopify.com/s/files/1/0428/4815/7859/files/55597914241.pdf
- https://cdn.shopify.com/s/files/1/0431/6522/1028/files/gujemetadesitenegalapebu.pdf
- https://cdn.shopify.com/s/files/1/0433/7431/3622/files/figedum.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/
- https://cdn.shopify.com/s/files/1

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007529.bin` `0773f23528c71dc4a8440df1015b1bdd3dc5e8caa70f0188640d5a4dc5809a92`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7529	5316 bytes
`font_01_sfnt_off00008729.bin` `750e0fdf889a68f786e75d126119f3e63cdbce9e11b6ebcf4c5a938c63c5ceb4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8729	10308 bytes
`font_02_sfnt_off0000aa98.bin` `bbc8a377ea308525ea4a093a1cfbcbef18081e68dbc1dc7ef94177a4c93541e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAA98	16448 bytes

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