PDF malware analysis — malicious · 5897fb1961cb7a0c

MALICIOUS

PDF

39.0 KB Created: 2020-07-29 22:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8c3a305d7d18b0dd7b55b2ce9904679 SHA-1: 913d9f40c3df5f55ab22f6b7f9935d8dd8ae2eb1 SHA-256: 5897fb1961cb7a0c10c74dc691f9cb32ee753d2a7c730c77caacbf0874ea3242

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains keywords related to the malicious URL's query parameter, suggesting a lure.

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.com/pify?keyword=scratch+coding+cards+pdf
- http://files.sfvcca.org/uploads/1/3/1/4/131437295/46bbf84e7ed.pdf
- http://files.alpineathleticchamp.com/uploads/1/3/1/4/131409385/3f2df6cfd3.pdf
- http://files.ewiechart.com/uploads/1/3/2/3/132302913/gomokiwu-dapewijutufose-jofumuvusu.pdf
- http://files.musicinterestfloor.net/uploads/1/3/0/9/130969548/wimidulug.pdf
- https://cdn.shopify.com/s/files/1/0431/1616/7328/files/25584435392.pdf
- https://cdn.shopify.com/s/files/1/0431/6938/2557/files/dafofi.pdf
- https://cdn.shopify.com/s/files/1/0431/7547/7405/files/pidasadafotoduxopu.pdf
- https://cdn.shopify.com/s/files/1/0429/5698/0377/files/benezojejaxej.pdf
- https://cdn.shopify.com/s/files/1/0433/7152/8344/files/lazeloniwutibusadama.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nozawilod.pdf
- https://cdn.shopify.com/s/files/1/0431/5915/8938/files/14765398734.pdf
- https://cdn.shopify.com/s/files/1/0429/2804/6233/files/74728328285.pdf
- https://cdn.shopify.com/s/files/1/0431/8360/3873/files/19513734781.pdf
- https://cdn.shopify.com/s/files/1/0432/6568/7717/files/vevok.pdf
- https://cdn.shopify.com/s/files/1/0431/4644/4960/files/zatuvesiteni.pdf
- https://cdn.shopify.com/s/files/1/0433/1916/5086/files/89599003667.pdf
- https://cdn.shopify.com/s/files/1/0432/9714/4990/files/mixuzanatu.pdf
- https://cdn.shopify.com/s/files/1/0431/5496/4629/files/duzisapix.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005b99.bin` `539a54313e16a7299be62be02f7d71903cfbd1240aa3ddd632e5100a6fa23117`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B99	5160 bytes
`font_01_sfnt_off00006d0a.bin` `a2d540c300eadba94d13d966314e7cc51dd9cab422bd494e8727296b9d69f60f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D0A	9992 bytes

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