PDF malware analysis — malicious · 54851a339d89aacc

MALICIOUS

PDF

58.6 KB Created: 2020-07-31 09:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 04c2196d09f926d25ca491ff731a3b5f SHA-1: 75005933d0041587bf75860e1f3d2de9e5a15dad SHA-256: 54851a339d89aacc7c23913486c7d25a9c40acd478421ea33a32b7ddcc253eb7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that is disguised as a textbook download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. The primary attack pattern involves tricking the user into clicking a link that ultimately leads 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.cc/pify?keyword=ethiopian+grade+12+chemistry+student+textbook+pdf
- http://files.keverse.com/uploads/1/3/2/3/132303269/cebb1f79baad2.pdf
- http://files.stephaniejoycecole.com/uploads/1/3/0/8/130813417/024bd06d1736.pdf
- http://files.riggsrentalsiowa.com/uploads/1/3/1/4/131453555/bitigi-vewufusujiwil-ragisijinenoro-sajakalotolaf.pdf
- http://files.jakeryancreations.com/uploads/1/3/1/3/131380916/4314840.pdf
- https://cdn.shopify.com/s/files/1/0435/2845/4298/files/nubewu.pdf
- https://cdn.shopify.com/s/files/1/0430/2631/7473/files/pezoraxiluduwejimovejegup.pdf
- https://cdn.shopify.com/s/files/1/0431/6954/6396/files/vudedoresazubej.pdf
- https://cdn.shopify.com/s/files/1/0440/7685/9557/files/73789049413.pdf
- https://cdn.shopify.com/s/files/1/0441/4459/1000/files/bifililujukow.pdf
- https://cdn.shopify.com/s/files/1/0439/5961/5646/files/91336198034.pdf
- https://cdn.shopify.com/s/files/1/0437/1460/9305/files/jumiranipetenosu.pdf
- https://cdn.shopify.com/s/files/1/0428/5385/9494/files/radukubosilip.pdf
- https://cdn.shopify.com/s/files/1/0434/7772/9432/files/ziwabejanunukobamubo.pdf
- https://cdn.shopify.com/s/files/1/0438/6829/1232/files/70665256632.pdf
- https://cdn.shopify.com/s/files/1/0432/0365/7887/files/74828771034.pdf
- https://cdn.shopify.com/s/files/1/0431/5732/3933/files/kesageko.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_off0000a4fd.bin` `2d0f35c53fe5fd1594224e7bd4c856d58cfd3f36481d2f4a9bf3d397b9b4e9cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4FD	5932 bytes
`font_01_sfnt_off0000b90c.bin` `ac7e1ae78b41369901d126f9958cf681a683d9a10f1750936d7de2538cfe820b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB90C	10548 bytes

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