PDF malware analysis — malicious · e2e9dfa8af854e91

MALICIOUS

PDF

54.6 KB Created: 2020-08-31 16:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: af76feaa5749810130e0895b7adc4845 SHA-1: 2912846d12bb1fcff183e7d10d0bd612ca39f83f SHA-256: e2e9dfa8af854e91c7b720d035829d47c78be8588d2584583efe827aff21c354

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, https://ttraff.cc/wix?keyword=gotham+bold+font++ttf, is flagged as a malicious redirector. The ML classifier also strongly indicates maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL and the link farm structure strongly suggest an attempt to lure users 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/wix?keyword=gotham+bold+font++ttf
- https://static.usrfiles.com/ugd/83f04e_3462935a19844bd7ad31a99a980701de.pdf
- https://static.usrfiles.com/ugd/625844_6a216fd169da4292b9d486a1917f392d.pdf
- https://static.usrfiles.com/ugd/4d6844_b4a917346d044393baa188d373334521.pdf
- https://static.usrfiles.com/ugd/696b8a_9fdb1ebfb3e54ff39fe3fab2f84b4147.pdf
- https://static.usrfiles.com/ugd/7e6083_034a276342ae4482aca2cb5c76fa7b12.pdf
- https://static.usrfiles.com/ugd/b8c837_70b90524175f4fe5af076053114ba32e.pdf
- https://static.usrfiles.com/ugd/b8c837_9ad48b43fafa4531af53524faa141fbf.pdf
- https://cdn.shopify.com/s/files/1/0430/4768/2201/files/xadodataveloboba.pdf
- https://cdn.shopify.com/s/files/1/0429/9145/2314/files/19774909122.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
- https://cdn.shopify.com/s/files/1/0435/9097/5647/files/virabeguwip.pdf
- https://cdn.shopify.com/s/files/1/0437/5648/6807/files/trastornos_alimentarios_unam.pdf
- https://cdn.shopify.com/s/files/1/0436/0775/2861/files/vujurulalapoxup.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_off00005d29.bin` `50bd8db5ff9a0f03ea6ac0366ab4ff273dceb6ff0c6101ac0faff1fd52ccc92d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D29	6168 bytes
`font_01_sfnt_off00006ccb.bin` `5d7361be7f830311f199c0abfea4aec8e7ca16069c3d7bda8a44fa6781d22fad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CCB	5044 bytes
`font_02_sfnt_off00007dd1.bin` `5b0602de55503b53e7ef83e7f6d9e802d7f9b20ea188d372c6c20bffa328106f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DD1	17528 bytes
`font_03_sfnt_off0000b3a4.bin` `0a5438f52f8ff6f5c66fa544b877b76aa3695323a02a3476ffd3758a80441ac2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3A4	17408 bytes

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