PDF malware analysis — malicious · 3a9fb0a4bc3dd3dc

MALICIOUS

PDF

49.6 KB Created: 2020-07-28 21:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: adb2c03b6ffa458c2c1cfcea03f43e82 SHA-1: a741bfb4b7b239e6d2388b6ff4ba68e0e1e79e4f SHA-256: 3a9fb0a4bc3dd3dc9329c6011aa54946f96e20b3beeeb54065a2513f36c7ea8a

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, but the presence of numerous external links, including one to a malicious redirector, suggests a phishing or SEO manipulation attack.

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=bootstrap+4+data+table+template
- http://files.tinazhang.com/uploads/1/3/1/3/131379183/tanojepilin.pdf
- http://files.alexandradiaries.com/uploads/1/3/2/7/132710776/jarelijomanadam_konakoj_daposodemaw_mupajigi.pdf
- http://files.daraconley.com/uploads/1/3/1/4/131453214/gisokufoz_firotakadotexex_xurakodo_bixowidabovege.pdf
- http://files.daraconley.com/uploads/
- https://cdn.shopify.com/s/files/1/0431/0230/6468/files/sotozikulovozoxisunuz.pdf
- https://cdn.shopify.com/s/files/1/0427/5719/3895/files/68990646699.pdf
- https://cdn.shopify.com/s/files/1/0435/5221/1099/files/57626249404.pdf
- https://cdn.shopify.com/s/files/1/0427/6014/3014/files/96594424408.pdf
- https://cdn.shopify.com/s/files/1/0431/1013/8017/files/buzokubizatemeletuwitube.pdf
- https://cdn.shopify.com/s/files/1/0437/3990/6209/files/kepikuzivomisazeleda.pdf
- https://cdn.shopify.com/s/files/1/0435/3123/9588/files/91372758484.pdf
- https://cdn.shopify.com/s/files/1/0430/9798/1089/files/46913937637.pdf
- https://cdn.shopify.com/s/files/1/0432/4638/7362/files/28520217287.pdf
- https://cdn.shopify.com/s/files/1/0428/4815/7859/files/98547869944.pdf
- https://cdn.shopify.com/s/files/1/0430/0088/9507/files/wovurejotib.pdf
- https://cdn.shopify.com/s/files/1/0432/0811/4340/files/66801787661.pdf
- https://cdn.shopify.com/s/files/1/0432/1044/0862/files/kepomipefurirokelakupa.pdf
- https://cdn.shopify.com/s/files/1/0440/7469/6856/files/fozeg.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_off00007882.bin` `d8f495f6cac224d249baf3e42292a52fd1fe5df9ed06e1687e48dfd0fcb90c6b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7882	5016 bytes
`font_01_sfnt_off00008993.bin` `57c1913f953087922cf88b92d880ac6a484551ea1fd81b7d53c2e416c111cabf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8993	15404 bytes

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