PDF malware analysis — malicious · dcd9369b9a928f6e

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 10:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9c5dafa6ec7c8a02a620d3c02c2aad72 SHA-1: 17f562accb586ada6c8499828bce24a73f5baf3a SHA-256: dcd9369b9a928f6eeac5b141627b22d9b8f272852bf76c2672355702af92bfe6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=canciones+infantiles+cortas+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename, suggesting a lure to disguise the malicious intent. The primary attack pattern involves tricking the user into clicking a link that leads to malicious infrastructure.

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=canciones+infantiles+cortas+pdf
- http://files.gokids-youthsports.com/uploads/1/3/2/6/132682106/1879171.pdf
- http://files.rlccc.com/uploads/1/3/1/3/131379382/9594349.pdf
- https://cdn.shopify.com/s/files/1/0430/7025/9357/files/kanesutegetixulixululo.pdf
- https://cdn.shopify.com/s/files/1/0439/4395/2539/files/76695043102.pdf
- https://cdn.shopify.com/s/files/1/0454/3532/2526/files/web_scraping_python_beautifulsoup.pdf
- https://cdn.shopify.com/s/files/1/0439/9228/5342/files/kugiwipanalofodobivona.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
- https://cdn.shopify.com/s/files/1/0435/5021/2264/files/image_processing_algorithms_in_c.pdf
- https://cdn.shopify.com/s/files/1/0427/6148/6503/files/17880550079.pdf
- https://cdn.shopify.com/s/files/1/0452/4598/9026/files/animaker_tutorial.pdf
- https://cdn.shopify.com/s/files/1/0430/3699/9833/files/probability_axioms.pdf
- https://cdn.shopify.com/s/files/1/0429/2437/6227/files/american_express_canada_contact_information.pdf
- https://cdn.shopify.com/s/files/1/0434/3008/4760/files/blacksmith_guide_ff14.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_off0000734a.bin` `63b5c896b222d297f48d14ed01c0db94d02521fdf49ab23b6558c3e411ff963c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x734A	5052 bytes
`font_01_sfnt_off0000847c.bin` `a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x847C	1800 bytes
`font_02_sfnt_off00008d09.bin` `85762f624be35ec614ad82a5ab7466e9c68f4b06c27e091eed588c356d293e61`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D09	11464 bytes

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