PDF malware analysis — malicious · 8e8a36a41fa49c66

MALICIOUS

PDF

40.5 KB Created: 2020-08-04 17:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8c0e505cb10465a2117d95f538b74f7 SHA-1: 82a6cf6e2319db88b4c81c1fdffc2ab45244138e SHA-256: 8e8a36a41fa49c66fa59a90755f049a07a1adf7369b4ba6be64b609f7dc49fe6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link identified is https://ttraff.ru/pify?keyword=osteoporosis+causes+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'osteoporosis causes pdf' and the wkhtmltopdf application, suggesting a lure to disguise the malicious link farm. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=osteoporosis+causes+pdf
- http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdf
- http://files.gogirlempowerment.org/uploads/1/3/1/3/131384359/tizizozewaxol.pdf
- http://fikepoxiz.crkeenwoodworking.com/uploads/1/3/0/8/130874197/8594062.pdf
- http://files.divinaeventdesign.com/uploads/1/3/2/6/132681210/1688123.pdf
- http://files.taycarpetinstall.com/uploads/1/3/1/4/131406222/midumapoginel.pdf
- https://cdn.shopify.com/s/files/1/0434/7219/1641/files/78313046501.pdf
- https://cdn.shopify.com/s/files/1/0434/0505/0008/files/75851405656.pdf
- https://cdn.shopify.com/s/files/1/0432/7319/1588/files/ludodafowitozam.pdf
- https://cdn.shopify.com/s/files/1/0433/6225/5013/files/89731131738.pdf
- https://cdn.shopify.com/s/files/1/0433/9607/1589/files/68547849006.pdf
- https://cdn.shopify.com/s/files/1/0428/9649/0663/files/2341841727.pdf
- https://cdn.shopify.com/s/files/1/0431/3192/8730/files/vuvuxopanifakizamib.pdf
- https://cdn.shopify.com/s/files/1/0428/1312/8863/files/bugemafuniti.pdf
- https://cdn.shopify.com/s/files/1/0428/6991/5814/files/kodadafepidokovapitu.pdf
- https://cdn.shopify.com/s/files/1/0433/8352/1445/files/xetuwudupumadi.pdf
- https://cdn.shopify.com/s/files/1/0432/2502/2621/files/fezubadavevol.pdf
- https://cdn.shopify.com/s/files/1/0432/5117/1478/files/430363369.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_off000061b2.bin` `d8694e4880d9be2a40df2a8e8617d739aa85027e2dc1863c6a1ebc59a0c3124f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61B2	5144 bytes
`font_01_sfnt_off0000733f.bin` `98debe2945c5a915e1ea5abf01600c521bb7b3f67ed8c537099460f4ff24040e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x733F	9992 bytes

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