PDF malware analysis — malicious · db66c61262453a38

MALICIOUS

PDF

38.6 KB Created: 2020-09-04 20:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0012bf70069131e4f4c8368ea737d593 SHA-1: 7333cd28bf18f1234f8f16e728d99b195f56c5bb SHA-256: db66c61262453a3864d0f9ad52d7a4c52ffd7ef80a72db937c64477ad59790d3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDFs, indicating a link farm or redirector strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=black+anodized+sheet+metal'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links.

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.club/wix?keyword=black+anodized+sheet+metal
- https://static.usrfiles.com/ugd/edb4a7_92ef3293548943a68f1e4793abb86c61.pdf
- https://static.usrfiles.com/ugd/3e9e83_d0f3ce55e32149efa1547e2308be5630.pdf
- https://static.usrfiles.com/ugd/5ea4d5_0d19545405634fa9a73fa38cb165fa1e.pdf
- https://static.usrfiles.com/ugd/cacfd7_e8e3cca26daf4056874f986b363f6dad.pdf
- https://static.usrfiles.com/ugd/cc089a_1bc3167f60524a058e715c0e6b13329d.pdf
- https://static.usrfiles.com/ugd/defcb2_0cb203a9c20a48cdb63c455e639fda1a.pdf
- https://static.usrfiles.com/ugd/5befcb_67ded377f2af494da9386acf664cf77a.pdf
- https://static.usrfiles.com/ugd/f9fac6_a1c5e17f3f2f4fac9216a253b3c2dada.pdf
- https://static.usrfiles.com/ugd/3c9ac1_3fd6d090a2da4a88a6c27082160050ec.pdf
- https://static.usrfiles.com/ugd/80bfa9_913b189d62994f37bb32b4157eaf0c0e.pdf
- https://static.usrfiles.com/ugd/930050_d7892aa33f5a49388e23351145ba08dd.pdf
- https://static.usrfiles.com/ugd/b8c837_2e20cf22dcff4ccd9db6f99ace2f907b.pdf
- https://static.usrfiles.com/ugd/7baf93_4ef414635b8149c988af5c1b4a800f7f.pdf
- https://static.usrfiles.com/ugd/90d19e_6fba857fb6534da598471324f7b54f36.pdf
- https://static.usrfiles.com/ugd/6924eb_bd3affabcf184b64b03ea3bc34cda20c.pdf
- https://static.usrfiles.com/ugd/296484_1d58f7e5859347cdb04e469a532f58b5.pdf
- https://static.usrfiles.com/ugd/ac51ce_25308c3225bc4c64b750cb05c53b4bc3.pdf
- https://static.usrfiles.com/ugd/b8c837_283e40783a034a528e2f92a6d43a4b39.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_off000057ce.bin` `0b8a9f3a20e30c6cedb91dcd1923f893b92b4f6433c22c867106c9696cadd587`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57CE	5244 bytes
`font_01_sfnt_off00006987.bin` `3c484673ecd21744ce78bdfc9e4c6d29d9497d038af8b4e0e54872f08c3b4779`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6987	10944 bytes

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