PDF malware analysis — malicious · d4e7647cd20374bd

MALICIOUS

PDF

58.4 KB Created: 2020-08-14 18:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a28c56e720afdaa98314da2ba2629fe7 SHA-1: 2f3dabdaa6c576e5b21505fe5f96d859ca997d60 SHA-256: d4e7647cd20374bd6194b7888870851619a78c85ae248073f290a37235d1da30

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with one identified as a malicious redirector pointing to 'https://ttraff.com/wb?keyword=logarithmic%20differentiation%20rules%20pdf'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly suggests malicious intent. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, many hosted on Shopify, which is often used to obscure malicious content. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify this as a phishing or redirection attack.

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=logarithmic%20differentiation%20rules%20pdf
- http://files.monroeinfo.com/uploads/1/3/1/4/131437711/voweruvojazivepome.pdf
- https://cdn.shopify.com/s/files/1/0440/3098/4357/files/22992646793.pdf
- https://cdn.shopify.com/s/files/1/0433/5196/5855/files/cateterismo_cardiaco_terapeutico.pdf
- https://cdn.shopify.com/s/files/1/0436/4831/9638/files/wotogefanataz.pdf
- https://cdn.shopify.com/s/files/1/0432/5038/5051/files/70078825527.pdf
- https://cdn.shopify.com/s/files/1/0437/6569/4613/files/73167320237.pdf
- https://cdn.shopify.com/s/files/1/0434/9270/4408/files/64613156630.pdf
- https://cdn.shopify.com/s/files/1/0436/2554/5890/files/jojiteworutewujomotuxibo.pdf
- https://cdn.shopify.com/s/files/1/0434/2179/4460/files/mathematics_dictionary_download.pdf
- https://cdn.shopify.com/s/files/1/0438/4686/0957/files/25838549931.pdf
- https://cdn.shopify.com/s/files/1/0429/7919/7081/files/obs_studio_twitch_chat.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007699.bin` `e9931ebd20a8edd0345884646fa33815d1ef1a1289387e4ddf40623528f2d2ff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7699	5508 bytes
`font_01_sfnt_off000088f3.bin` `aa6c8fe7e4958477d55858bf6db5a08750ed3ed5bcfe29d2090a9316a62a8816`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88F3	6300 bytes
`font_02_sfnt_off0000984f.bin` `827bafc7beca643f24c7f63074673f48fcfd7e72042a8439fa27d9dcd0d01060`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x984F	14648 bytes
`font_03_sfnt_off0000c721.bin` `43ecbcdeb92ac0e9bd5bb95be67c3baf94e0aa708e798394ac2ffbf38ac848e3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC721	16188 bytes

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