PDF malware analysis — malicious · 2b50cccc8bf63994

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 11:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0481b78c22af137196907e9871fe3cbe SHA-1: 5c7fce3d2be04100bcef754ca6adeb16455afeee SHA-256: 2b50cccc8bf63994b38cd5346572acc017dac39a8f301ac8a53035e32610859f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which are hosted on Shopify, but one critical link redirects to a known malicious domain. The document body and embedded links suggest a lure for a 'Pathfinder player guide pdf', which is likely a pretext to drive users to the malicious redirector. 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.cc/pify?keyword=pathfinder+player+guide+pdf
- http://files.flyfishinginstructors.co.uk/uploads/1/3/2/6/132696465/6193947.pdf
- http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
- http://files.redatnightstudios.com/uploads/1/3/1/6/131636987/givomab.pdf
- http://files.rsdpestcontrol.com/uploads/1/3/1/3/131398401/4aff08.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
- https://cdn.shopify.com/s/files/1/0428/5438/3782/files/tobulexix.pdf
- https://cdn.shopify.com/s/files/1/0435/4765/6351/files/zegamumefirinagajilup.pdf
- https://cdn.shopify.com/s/files/1/0432/8102/3140/files/49680449454.pdf
- https://cdn.shopify.com/s/files/1/0429/5612/8412/files/94535591469.pdf
- https://cdn.shopify.com/s/files/1/0430/2995/4721/files/11531132854.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
- https://cdn.shopify.com/s/files/1/0434/9450/6661/files/dujowe.pdf
- https://cdn.shopify.com/s/files/1/0433/7578/8184/files/lawusuzadodusilelorirediz.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
- https://cdn.shopify.com/s/files/1/0427/6033/9623/files/bejikadogot.pdf
- https://cdn.shopify.com/s/files/1/0434/6655/5557/files/daturatokigemijefa.pdf
- https://cdn.shopify.com/s/files/1/0429/0550/1852/files/4022683165.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005549.bin` `e296d185707247ad0f834e0bd50842ac51d332b0ae2952113d1852106d2dc5e7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5549	5000 bytes
`font_01_sfnt_off00006639.bin` `77250a5cba9c1c9b453768658faf32291ff4e996152b17867717121f2fe8977e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6639	10168 bytes
`font_02_sfnt_off00008920.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8920	4324 bytes

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