PDF malware analysis — malicious · c4982a0bd14d9bfd

MALICIOUS

PDF

64.6 KB Created: 2020-08-18 20:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c19e715a61cd12969d877c238a2b5dd5 SHA-1: 958ea7d16a021233192ecefe8db1851d2ec3eefc SHA-256: c4982a0bd14d9bfd0aad58ee17bb9ffc75d43ff6ab0ed6057aad35711a75c7f2

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a piano sheet music download, aiming to lure users to a harmful site. The PDF also hosts a large number of external links, many pointing to Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=the+disappearance+of+hatsune+miku+piano+sheet
- http://files.joerussellphotos.com/uploads/1/3/1/6/131637374/5649061.pdf
- http://weritoko.bellstobritain.com/uploads/1/3/1/6/131607163/5897340.pdf
- https://cdn.shopify.com/s/files/1/0437/6176/2455/files/30946578030.pdf
- https://cdn.shopify.com/s/files/1/0433/5747/0870/files/645063100.pdf
- https://cdn.shopify.com/s/files/1/0429/8014/7359/files/32645232961.pdf
- https://cdn.shopify.com/s/files/1/0428/1548/8163/files/html_table_template_with_inline_css.pdf
- https://cdn.shopify.com/s/files/1/0433/6641/6534/files/rapejurowazozurol.pdf
- https://cdn.shopify.com/s/files/1/0433/6749/7880/files/70650905299.pdf
- https://cdn.shopify.com/s/files/1/0430/9532/6887/files/xuxidovud.pdf
- https://cdn.shopify.com/s/files/1/0431/3058/5239/files/64522767728.pdf
- https://cdn.shopify.com/s/files/1/0431/0279/7986/files/mixexebipofekij.pdf
- https://cdn.shopify.com/s/files/1/0440/8714/8709/files/tecnologia_de_la_informatica.pdf
- https://cdn.shopify.com/s/files/1/0431/0358/4409/files/8752744583.pdf
- https://cdn.shopify.com/s/files/1/0429/3741/7891/files/doxefidulimuz.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a3c.bin` `8eba5026ae21d06a5a839ed5dfcc3b96bbedd2c8cb4f621998218b06becb252f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A3C	7200 bytes
`font_01_sfnt_off00009266.bin` `3808060e103d77689bd77a8452a386d0470d9ca690cae4ed3871a3404812c4e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9266	5376 bytes
`font_02_sfnt_off0000a485.bin` `3e8bf3d26513cebe07ded34fad379cbe73ef725cc3c6426350c53ca7c4537555`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA485	17672 bytes
`font_03_sfnt_off0000dafa.bin` `7346ead4b0003e59f6fccbad71943e3c1772702f3dd9506c2916a0e1081307ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAFA	17212 bytes

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