PDF malware analysis — malicious · 233a2e3b2c99ef42

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 02:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9d1055d64bca364b07349f4ee5cb9e05 SHA-1: 48f6c641e86bfa2c3437288e894759da1e221079 SHA-256: 233a2e3b2c99ef42e7be2c11aeb479d854d1b01fd82fbf5ac17ffa27f8302e04

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the string 'Compact oxford thesaurus pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=compact+oxford+thesaurus+pdf
- http://files.southerncare.co.uk/uploads/1/3/1/4/131437625/f4a145f81f0d.pdf
- http://nunoz.neighbourhoodmassage.com/uploads/1/3/1/8/131871674/3087184.pdf
- http://files.theboisterousbabe.com/uploads/1/3/1/4/131407665/xisufe_kelekixat_zosatelu.pdf
- http://files.aurorasantiago-ortiz.com/uploads/1/3/2/6/132680860/5e358c7cc.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
- https://cdn.shopify.com/s/files/1/0430/0718/0954/files/ao_da_acetilcolina.pdf
- https://cdn.shopify.com/s/files/1/0433/3692/5342/files/56076231727.pdf
- https://cdn.shopify.com/s/files/1/0430/0190/5315/files/ribejolomubegemexesav.pdf
- https://cdn.shopify.com/s/files/1/0439/9477/5710/files/html_to_converter_angular_6.pdf
- https://cdn.shopify.com/s/files/1/0430/2631/7473/files/rasolojukarogizepado.pdf
- https://cdn.shopify.com/s/files/1/0432/0041/3856/files/jitivolitidizowemisorubo.pdf
- https://cdn.shopify.com/s/files/1/0427/8085/2383/files/demakizasimedemo.pdf
- https://cdn.shopify.com/s/files/1/0433/7860/6229/files/50862512928.pdf
- https://cdn.shopify.com/s/files/1/0430/9496/6429/files/shahrzad_2_part_15_full.pdf
- https://cdn.shopify.com/s/files/1/0431/9854/6084/files/tejoj.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_off00005478.bin` `3b26cddfd684ae3dd1d6c6f2f8e242838226be556c8829d7f4cf8ad881d76292`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5478	5336 bytes
`font_01_sfnt_off00006675.bin` `b43a4d565e283c44940ec9ddee6d46fadfe013e28ecba89146089bad9fa0d7b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6675	10644 bytes

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