PDF malware analysis — malicious · bc53587523727b44

MALICIOUS

PDF

50.7 KB Created: 2020-08-12 07:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b5f0dd084be32027d2fb64e06bee452d SHA-1: 1330d90c39db1356574b411720eda5d9abcad4cc SHA-256: bc53587523727b44aa29085a1fda632a877f358e6d96b35ec1473c40b3427da9

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/wb?keyword=tsspdcl%20recruitment%202018%20notification%20pdf'. This indicates the document is designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple external links, including a link farm, suggests a delivery mechanism for further 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.ru/wb?keyword=tsspdcl%20recruitment%202018%20notification%20pdf
- http://files.muskaansupportaustralia.com/uploads/1/3/0/7/130739269/texalovogilel-zevol.pdf
- http://zevizoza.anotsoemptynest.com/uploads/1/3/0/7/130776791/e503a5e7c9986.pdf
- http://files.seeyoudowntheroad.org/uploads/1/3/2/6/132681969/sogazud.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
- https://cdn.shopify.com/s/files/1/0431/5106/5242/files/mipiriwukufamixozidu.pdf
- https://cdn.shopify.com/s/files/1/0431/5106/5243/files/m16_lower_receiver_blueprint.pdf
- https://cdn.shopify.com/s/files/1/0434/0740/9308/files/brew_update_npm.pdf
- https://cdn.shopify.com/s/files/1/0431/9903/7595/files/16774073757.pdf
- https://cdn.shopify.com/s/files/1/0432/2813/5591/files/robot_actuators_and_feedback_components.pdf
- https://cdn.shopify.com/s/files/1/0428/5222/1091/files/11835367165.pdf
- https://cdn.shopify.com/s/files/1/0454/7867/4584/files/dokuvovitigevuvevi.pdf
- https://cdn.shopify.com/s/files/1/0434/0390/3127/files/94779959586.pdf
- https://cdn.shopify.com/s/files/1/0432/6142/7867/files/37211686591.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000795d.bin` `160765d6f5770087a49bf4d058faa4f0e8c518a67e99c9c0f485dd702af4bfa3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x795D	5768 bytes
`font_01_sfnt_off00008cef.bin` `bda69d267fdbbaf9b090886fa5c0df7f51d4d02958695faafe29a94f84bb01bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CEF	10736 bytes
`font_02_sfnt_off0000b173.bin` `8de7198c603e5459c9d0580563b1dbd6e4091048287f6397e84fbe2342ac77e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB173	2964 bytes

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