PDF malware analysis — malicious · 857caaa952cf87f9

MALICIOUS

PDF

96.7 KB Created: 2020-08-14 02:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ae846b06e2a348d0c68ea01557bc9146 SHA-1: 31d5f316dcb69d47914b3318bd6d59693b51616b SHA-256: 857caaa952cf87f93c3c8426ee8ebec4b9fb0095bd19904b2e280af65b3fe0fa

152 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.com/wb?keyword=tensorflow%202.0%20tutorial%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0429/9443/4202/files/48840032952.pdf'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, also contains the malicious URL.

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/wb?keyword=tensorflow%202.0%20tutorial%20pdf
- http://files.danahamilton.com/uploads/1/3/0/9/130969260/rovafavopaz_dugotupuxomef_zubosudus.pdf
- http://files.bampilates.com/uploads/1/3/1/4/131438741/1940dcd9a51.pdf
- http://kofabev.dailymewscharlotte.com/uploads/1/3/0/7/130740489/bojeroduvozi.pdf
- https://cdn.shopify.com/s/files/1/0429/9443/4202/files/48840032952.pdf
- https://cdn.shopify.com/s/files/1/0434/7097/9237/files/42608212879.pdf
- https://cdn.shopify.com/s/files/1/0431/2668/5850/files/likuzififib.pdf
- https://cdn.shopify.com/s/files/1/0430/1216/1685/files/mick_jenkins_martyrs.pdf
- https://cdn.shopify.com/s/files/1/0432/2004/1886/files/8310630395.pdf
- https://cdn.shopify.com/s/files/1/0436/9648/8613/files/xowozinoxibiposu.pdf
- https://cdn.shopify.com/s/files/1/0427/9622/0572/files/rozotagulupawadanofupibo.pdf
- https://cdn.shopify.com/s/files/1/0432/1987/8048/files/40498637270.pdf
- https://cdn.shopify.com/s/files/1/0427/6636/8935/files/2813216352.pdf
- https://cdn.shopify.com/s/files/1/0428/5667/7543/files/castellan_fisico_quimica_download.pdf
- https://cdn.shopify.com/s/files/1/0429/2087/0044/files/regigumoxoxuzutiroro.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_off00012590.bin` `1eddefdbc50962c6f118b58b459fd4708445c4c9680eed6840270f02d33483e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12590	5264 bytes
`font_01_sfnt_off00013794.bin` `4d70befd8b1e3b5360d19da447fde66b969880aaec44abc0af96108ba1e224a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13794	15652 bytes
`font_02_sfnt_off00016816.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16816	4324 bytes

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