PDF malware analysis — malicious · 2ff5dac8fa45cc8d

MALICIOUS

PDF

61.2 KB Created: 2020-08-11 19:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aa24337ba2b5f15d359e9e0a6f2c6455 SHA-1: e0e3602e7ec04f88b0d908ab31b9485b632202f5 SHA-256: 2ff5dac8fa45cc8d31fb96f96e3ecd4ed4bb3af3af3b3bb06fd26aac8f6ae8c4

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cationic+surfactants+pdf'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and several other Shopify-hosted PDF links, suggesting a coordinated effort to lure users to malicious content.

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=cationic+surfactants+pdf
- http://ruzixel.tikicab.com/uploads/1/3/1/1/131164250/sijiwitevadiruleti.pdf
- http://files.dinghyfever.com/uploads/1/3/1/6/131607407/4e3d6a8c.pdf
- http://files.bernerayhistorical.com/uploads/1/3/1/4/131405948/153e2343c42a846.pdf
- https://cdn.shopify.com/s/files/1/0434/9191/7989/files/aluminium_fabrication_materials_names.pdf
- https://cdn.shopify.com/s/files/1/0436/7931/8166/files/cms_1500_fillable.pdf
- https://cdn.shopify.com/s/files/1/0432/2328/5928/files/zatuxare.pdf
- https://cdn.shopify.com/s/files/1/0431/0600/9255/files/50851747359.pdf
- https://cdn.shopify.com/s/files/1/0434/0586/9208/files/31561073768.pdf
- https://cdn.shopify.com/s/files/1/0430/6377/1293/files/jatoburimisaxetisafisan.pdf
- https://cdn.shopify.com/s/files/1/0431/7433/0517/files/wolf_team_hack_2015.pdf
- https://cdn.shopify.com/s/files/1/0429/7090/6780/files/45552015688.pdf
- https://cdn.shopify.com/s/files/1/0428/5107/4214/files/36477515378.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
- https://cdn.shopify.com/s/files/1/0432/9019/8180/files/45472041349.pdf
- https://cdn.shopify.com/s/files/1/0428/5526/8519/files/44824130654.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_off0000a539.bin` `a570b569abb336ac68176304877e98583cc33c9d5b95f8709323b276e73d52dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA539	4904 bytes
`font_01_sfnt_off0000b5eb.bin` `85379869c3093310ba7afd938bc6e28af051f67b1d8def0adf5365262e660990`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5EB	10636 bytes
`font_02_sfnt_off0000da32.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA32	4324 bytes

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