PDF malware analysis — malicious · 20d5e33c4d2f793b

MALICIOUS

PDF

63.7 KB Created: 2020-08-21 03:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b88ee56deeedcad4be235fd75f9716f9 SHA-1: 94b074499898c2dc750db124afb1eb9da1f6ce15 SHA-256: 20d5e33c4d2f793b219b5bb4d994572a066ba73e69be41e48d0a8bbdbb73d5f2

158 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded JavaScript and multiple links, one of which, https://ttraff.com/pify?keyword=bluedio+i4+bluetooth+stereo+headset+manual+pdf, is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to a manual and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy to improve SEO and potentially mask the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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 JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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=bluedio+i4+bluetooth+stereo+headset+manual+pdf
- http://xamebaj.stannard.co.nz/uploads/1/3/0/7/130776525/5f38b3187.pdf
- http://files.graceyourspace.com/uploads/1/3/0/8/130874668/4333609.pdf
- https://cdn.shopify.com/s/files/1/0436/2957/6352/files/algebra_problems_grade_8.pdf
- https://cdn.shopify.com/s/files/1/0429/6815/4278/files/net_framework_2._0.pdf
- https://cdn.shopify.com/s/files/1/0434/4345/4102/files/xilafo.pdf
- https://cdn.shopify.com/s/files/1/0432/9432/6944/files/87025054350.pdf
- https://cdn.shopify.com/s/files/1/0430/5308/8919/files/51960825972.pdf
- https://cdn.shopify.com/s/files/1/0437/7618/0376/files/dizesogo.pdf
- https://cdn.shopify.com/s/files/1/0439/7475/4462/files/31430941729.pdf
- https://cdn.shopify.com/s/files/1/0433/8404/5719/files/40157293156.pdf
- https://cdn.shopify.com/s/files/1/0428/5769/3347/files/dirifaduzat.pdf
- https://cdn.shopify.com/s/files/1/0429/4030/1478/files/gunevetimig.pdf
- https://cdn.shopify.com/s/files/1/0429/7257/7946/files/buselejedemuweter.pdf
- https://cdn.shopify.com/s/files/1/0430/1740/4573/files/banking_terms_gradeup.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_off0000bb02.bin` `2c6df0ee92905637bc249e956021e51dafc9ae90dfb0527ceb55d6cb13d8df27`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB02	5556 bytes
`font_01_sfnt_off0000cdbb.bin` `2fb443b733a6fab12da3069399e4a4165edad12965f0ef0da4a750a986fc3ebd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDBB	10420 bytes

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