PDF malware analysis — malicious · b94f255306715205

MALICIOUS

PDF

43.7 KB Created: 2020-08-03 07:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 98d7ac88af97420fc4b50a162882b592 SHA-1: f55962d2975d3814ea4eebcbb2f0534f7b8e98f2 SHA-256: b94f255306715205e3510a41ed03869641c88026705cb9a63dcfb0db8b7b7e84

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or link farm tactic. One of the primary links, https://ttraff.cc/wb?keyword=estudio%20anual%20de%20redes%20sociales%202018%20pdf, is identified as a known malicious redirector. The document body contains garbled text but includes the same URL and other PDF links, reinforcing the malicious intent.

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/wb?keyword=estudio%20anual%20de%20redes%20sociales%202018%20pdf
- http://files.allenlightshow.com/uploads/1/3/2/6/132682745/7d61264286bde.pdf
- http://files.matthewhavertz.com/uploads/1/3/1/0/131070849/dikobovot-jisuxipen-zusaku.pdf
- http://files.jbhealth.co.uk/uploads/1/3/0/7/130739183/4307364.pdf
- http://files.salentoby5.com/uploads/1/3/2/6/132681352/bivonumajorikug_kejimetazoligis.pdf
- http://files.mrwhitcher.com/uploads/1/3/1/3/131380889/nulivulamibixi.pdf
- https://cdn.shopify.com/s/files/1/0432/0041/3856/files/82968762531.pdf
- https://cdn.shopify.com/s/files/1/0440/9258/8184/files/zokuronuporepirarab.pdf
- https://cdn.shopify.com/s/files/1/0427/7737/8972/files/39271284435.pdf
- https://cdn.shopify.com/s/files/1/0431/8176/8864/files/dawofaradirodojeviw.pdf
- https://cdn.shopify.com/s/files/1/0431/5312/9640/files/jimerimifavekemi.pdf
- https://cdn.shopify.com/s/files/1/0430/6649/1031/files/why_did_notsobot_get_banned.pdf
- https://cdn.shopify.com/s/files/1/0431/4457/7178/files/xikog.pdf
- https://cdn.shopify.com/s/files/1/0431/8153/9483/files/12910608928.pdf
- https://cdn.shopify.com/s/files/1/0431/6299/2795/files/tasejikadoxav.pdf
- https://cdn.shopify.com/s/files/1/0438/2585/6669/files/gabula.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdf
- https://cdn.shopify.com/s/files/1/0430/8297/3346/files/31165412164.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_off000067ce.bin` `802e93e649f5390c6a7fbe5256e8a5e95ed00d827185ade4cfa6d7ac5c65bb03`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67CE	5628 bytes
`font_01_sfnt_off00007b0e.bin` `b1712a37c14cb59e90ead16680e7e4bb669765b4ab25476881bcc80b85c3ea6e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B0E	11396 bytes

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