PDF malware analysis — malicious · 8852b25b1cf9d2df

MALICIOUS

PDF

49.7 KB Created: 2020-08-05 15:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e1c61e7edbf5369b7e800c8c14cf7c4 SHA-1: 698651ee310edb4f1a50d3d90aad5b9288dc6d1f SHA-256: 8852b25b1cf9d2dfb6e5448fb1f75a7f38734d8d774ef740e9e546c8ef987c68

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a technique often used to redirect users to malicious sites. Specifically, it links to a known malicious redirector at 'ttraff.ru' which is disguised with a search query related to philosophy. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive 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.ru/pify?keyword=basic+branches+of+philosophy+pdf
- http://files.veganrepublicstore.org/uploads/1/3/0/7/130739155/4954705.pdf
- http://files.kansascitydreamkeepers.com/uploads/1/3/0/7/130738513/lataw-zunanuvimol.pdf
- http://gowejo.johnsonvilleheritagefestival.com/uploads/1/3/0/7/130740141/bixipava.pdf
- http://rusesanog.bellydancedigs.com/uploads/1/3/1/6/131606407/fb8d96546.pdf
- http://nejilafuf.lazyachievers.com/uploads/1/3/1/4/131482952/jegovo.pdf
- https://cdn.shopify.com/s/files/1/0432/9956/9829/files/zurufobugaf.pdf
- https://cdn.shopify.com/s/files/1/0439/1773/8152/files/nanof.pdf
- https://cdn.shopify.com/s/files/1/0428/3518/1724/files/livakas.pdf
- https://cdn.shopify.com/s/files/1/0438/0862/0701/files/nojaz.pdf
- https://cdn.shopify.com/s/files/1/0432/4907/4336/files/tavamajusewotono.pdf
- https://cdn.shopify.com/s/files/1/0428/7938/5766/files/puwojulexuxezesekusaje.pdf
- https://cdn.shopify.com/s/files/1/0431/4519/9777/files/nixawakilamikewe.pdf
- https://cdn.shopify.com/s/files/1/0433/3305/8715/files/xiruvizitodonilajufewutur.pdf
- https://cdn.shopify.com/s/files/1/0428/0709/9558/files/52354638760.pdf
- https://cdn.shopify.com/s/files/1/0432/7315/8821/files/29961870573.pdf
- https://cdn.shopify.com/s/files/1/0436/4877/8400/files/98961983334.pdf
- https://cdn.shopify.com/s/files/1/0432/0047/9391/files/kewexuve.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_off00008136.bin` `d5c41e1234649455b6e0b16866bb24d8c5d3453338102e03f74489c03305f158`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8136	5532 bytes
`font_01_sfnt_off00009400.bin` `7d7c25262b26cefcef69dd0f25113c8ddc99055612100dc5a7415de65bc4bdd8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9400	11312 bytes

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