PDF malware analysis — malicious · ae625b8d608628c9

MALICIOUS

PDF

45.6 KB Created: 2020-08-20 11:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aec0475275bdb97bd63c513bbdae09f2 SHA-1: 3446b589984e9d31b5e186ed1b552093464c526d SHA-256: ae625b8d608628c96116cf949a90a48a3693080c487b3193d139e50e1eed59dc

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but the primary malicious link is to a redirector. The document body and embedded links suggest a lure for a guitar tuner application, which is likely a pretext to drive traffic to the malicious URL. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a known malicious redirector.

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=apk+chromatic+guitar+tuner+versi+lama
- http://files.shawelectronics.com/uploads/1/3/1/3/131380687/kezopagunozafo-depaxakosupore-lawufexaj-libixid.pdf
- http://files.simplysouthernfoodie.com/uploads/1/3/0/7/130739062/bowigugow-zirexefununeg.pdf
- http://mepew.bluwooddesignandbuild.co.uk/uploads/1/3/0/7/130738732/mazuduxumid.pdf
- http://pafobeso.orvjamboree.org/uploads/1/3/2/3/132303382/fadezadogel.pdf
- https://cdn.shopify.com/s/files/1/0433/0674/6011/files/chains_laurie_halse_anderson.pdf
- https://cdn.shopify.com/s/files/1/0433/2548/9305/files/copernican_revolution_kuhn.pdf
- https://cdn.shopify.com/s/files/1/0430/6383/6834/files/classic_wow_hunter_weapons.pdf
- https://cdn.shopify.com/s/files/1/0437/6962/6781/files/52599666233.pdf
- https://cdn.shopify.com/s/files/1/0430/1006/4537/files/44366281650.pdf
- https://cdn.shopify.com/s/files/1/0433/3817/0523/files/total_abdominal_histerektomi.pdf
- https://cdn.shopify.com/s/files/1/0431/6269/7894/files/31116186882.pdf
- https://cdn.shopify.com/s/files/1/0433/6661/3141/files/92558012000.pdf
- https://cdn.shopify.com/s/files/1/0433/8096/5534/files/fefanonixugotiroson.pdf
- https://cdn.shopify.com/s/files/1/0433/9413/8277/files/82211731947.pdf
- https://cdn.shopify.com/s/files/1/0428/8089/3084/files/78000729930.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_off00005e4a.bin` `828c37cdc21536219c8966f1a88823449ba8312f7b93465d2266456279e7a6c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E4A	5344 bytes
`font_01_sfnt_off00007051.bin` `44c89a2e16e1f684f3701a44c2d3557f5ee9d1ca9f5aa6c02b6f7fcc58b89ed8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7051	13788 bytes
`font_02_sfnt_off00009b42.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B42	4324 bytes

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