PDF malware analysis — malicious · 9b23379aaf47b755

MALICIOUS

PDF

36.7 KB Created: 2020-08-04 21:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bf54d0e4c14256d00f1b9a0bbb79d66c SHA-1: 1a3de6feb4f2cc98df139b2de917718a7ad7476d SHA-256: 9b23379aaf47b755bf93dda9474a711dc2a3ac02e409d830a707efe763638bd2

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'manual for ring doorbell 2'. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites, likely for further exploitation or phishing. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=manual%20for%20ring%20doorbell%202
- http://files.paraglidinginkorea.com/uploads/1/3/1/4/131437330/6514853.pdf
- http://files.maltiel.com/uploads/1/3/0/7/130738639/wuwafipum-lukofifafe.pdf
- http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
- http://files.oasischurchaiken.com/uploads/1/3/1/4/131437806/284894.pdf
- http://files.sacredheartjc.org/uploads/1/3/1/4/131453214/wasajur.pdf
- https://cdn.shopify.com/s/files/1/0433/9915/1768/files/gosixevibuxovenum.pdf
- https://cdn.shopify.com/s/files/1/0430/7533/8391/files/39807382013.pdf
- https://cdn.shopify.com/s/files/1/0432/4684/6107/files/60352233043.pdf
- https://cdn.shopify.com/s/files/1/0434/8438/1337/files/57501166151.pdf
- https://cdn.shopify.com/s/files/1/0439/6669/3534/files/molodoladukudotidufakar.pdf
- https://cdn.shopify.com/s/files/1/0430/0043/0746/files/mapoxatumojozazijepiz.pdf
- https://cdn.shopify.com/s/files/1/0435/8560/1695/files/nozapekupobip.pdf
- https://cdn.shopify.com/s/files/1/0431/3192/8730/files/88990550639.pdf
- https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rilowujokik.pdf
- https://cdn.shopify.com/s/files/1/0432/6519/6197/files/mini_budget_2020_pakistan.pdf
- https://cdn.shopify.com/s/files/1/0433/9505/5777/files/50641341159.pdf
- https://cdn.shopify.com/s/files/1/0432/5982/2244/files/household_budget_sheet.pdf
- https://cdn.shopify.com/s/files/1/0433/2313/0009/files/26540091055.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_off000051f0.bin` `cbd57676f4ae9f60751c4abba38a0b4dff4851e884f24429d976afee6a3581c4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x51F0	5176 bytes
`font_01_sfnt_off000063a8.bin` `7dc4ba9a119d793816728971a9bc799633ad7e93a37f9022cf19936e34117c3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63A8	10084 bytes

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