PDF malware analysis — malicious · db6f3f75ae6c8b10

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 05:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bdfe1ffc0f7e043cb5c0f1d58c1ae066 SHA-1: 40f5c9f8921406df53eaf7e1c1ae539c2b81307e SHA-256: db6f3f75ae6c8b108f29714e6b2db5ff73661da82afbfc48405cb37387aa21c5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=exercicios+sobre+vertices+arestas+e', which is flagged as malicious. The presence of numerous external links suggests a link farm or redirection tactic to obscure the final malicious destination.

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/wix?keyword=exercicios+sobre+vertices+arestas+e
- https://static.usrfiles.com/ugd/c63dba_d444c8c8a3b349ca967d8e4cdcbe4245.pdf
- https://static.usrfiles.com/ugd/2b25b5_734f2df35e8346f7af3ac65be2790ab2.pdf
- https://static.usrfiles.com/ugd/b5472a_36476ae302c94357a9cdf950ba93aceb.pdf
- https://static.usrfiles.com/ugd/b8c837_42a8662ca4ad47a9b6d185786cad8943.pdf
- https://cdn.shopify.com/s/files/1/0440/8911/4789/files/modified_barthel_index_stroke.pdf
- https://cdn.shopify.com/s/files/1/0429/8761/8463/files/bijaduvetisuvigeg.pdf
- https://cdn.shopify.com/s/files/1/0439/5663/3758/files/22334902740.pdf
- https://cdn.shopify.com/s/files/1/0429/3066/7673/files/fonts_similar_to_impact.pdf
- https://static.usrfiles.com/ugd/fa6f14_e019679e749940b19ecd1551db315331.pdf
- https://static.usrfiles.com/ugd/f09a9d_f0adacdd21344b578831115c799c0790.pdf
- https://cdn.shopify.com/s/files/1/0428/3262/5831/files/nalen.pdf
- https://cdn.shopify.com/s/files/1/0432/7276/5598/files/dupexalugusow.pdf
- https://cdn.shopify.com/s/files/1/0437/0055/1830/files/23744541071.pdf
- https://cdn.shopify.com/s/files/1/0437/7785/1550/files/86511611635.pdf
- https://cdn.shopify.com/s/files/1/0434/2287/5800/files/52340080376.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_off000061b3.bin` `6e10932b38c859927b8220ee5c241e3f2806b72b26f6f3ca55932e1a2a55f869`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61B3	4668 bytes
`font_01_sfnt_off000071a0.bin` `9f0846310fa971817d98e190140a7a09d39c9915596346237a75235940b1f1db`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71A0	13176 bytes
`font_02_sfnt_off00009b86.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B86	4324 bytes

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