PDF malware analysis — malicious · 8a81e5f90d47cdea

MALICIOUS

PDF

43.2 KB Created: 2020-09-11 22:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 020f7551e70143dd7d28a817a53aa158 SHA-1: e207c3e09fe44ebac93cd2d1521ad9e5f510838e SHA-256: 8a81e5f90d47cdea21e4940db909d28a5d0527bcfeafd9f4def6ed83bf7917be

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one pointing to 'ttraff.ru', are suspicious and likely lead to malicious content or phishing sites. The document body contains garbled text and a URL, further supporting the malicious intent.

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.ru/wb?keyword=hawks%20nest%20tunnel%20disaster%20pdf
- https://cdn.shopify.com/s/files/1/0436/9262/1978/files/senusefisapaj.pdf
- https://cdn.shopify.com/s/files/1/0431/6279/6186/files/83827642869.pdf
- https://cdn.shopify.com/s/files/1/0457/3623/1068/files/25725314406.pdf
- https://static.usrfiles.com/ugd/808cd0_76185005e4514499a43460dce196a551.pdf
- https://static.usrfiles.com/ugd/787b0a_d5b99368fcc444c8a90fcc906c844d8e.pdf
- https://static.usrfiles.com/ugd/bc84a3_0a12ede50a764061aa5b70b922396548.pdf
- https://static.usrfiles.com/ugd/268ab1_c58a2aa826d14e00b726b96f5a03a6b3.pdf
- https://static.usrfiles.com/ugd/086daf_9e14987a15c9446ea20ff1151d31f3e1.pdf
- https://static.usrfiles.com/ugd/4a6c57_f1490ca8f4264682b142bdd9fd7ec83a.pdf
- https://static.usrfiles.com/ugd/7a13df_82ad5def58634320987c1572446d4a4c.pdf
- https://static.usrfiles.com/ugd/b8c837_98cd7f61adbf4dd3a33e90340b305af8.pdf
- https://static.usrfiles.com/ugd/c20ea7_a5187ef1a2f441bbafdefdf94ad467a4.pdf
- https://static.usrfiles.com/ugd/b16523_66581e5e33c244c6a0bfa62856f42ff2.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_off00005e31.bin` `bbf943f878b555d5717d89328747cb82dee44bde5a4377b3c3a30e57562c978b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E31	4924 bytes
`font_01_sfnt_off00006f03.bin` `14fc9a0a15081384a0860627bbeffd8284cbcb9d495b86fd8656b3dd52fa29bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F03	10212 bytes
`font_02_sfnt_off00009200.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9200	4324 bytes

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