PDF malware analysis — malicious · 58e53d15d4852d78

MALICIOUS

PDF

37.3 KB Created: 2020-09-01 00:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a551501bc184d1456b83048715b12580 SHA-1: 5ce4205051dacd1ffa070755f75ec1f461425676 SHA-256: 58e53d15d4852d7833a68aca4837f17a760cb40b9ec581671b2f11fd83281261

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 large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/wix?keyword=free++cartoon+beer+glass, which likely serves as a redirector to further malicious content. The document body, though heavily corrupted, contains references to this URL and other PDF files hosted on static.usrfiles.com, reinforcing the link farm tactic.

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=free++cartoon+beer+glass
- https://static.usrfiles.com/ugd/b8c837_807607779fc04239a6a21bfcf431a1df.pdf
- https://static.usrfiles.com/ugd/6cfc61_5eb3106247a943249602cb2659c42b5c.pdf
- https://static.usrfiles.com/ugd/b42fd6_f5a9d36f50904c37ad38c14a96a78544.pdf
- https://static.usrfiles.com/ugd/10e3af_a66cf365daa74a5ab6fd026c6f74107b.pdf
- https://static.usrfiles.com/ugd/12dc78_2d3947549a1d457daa93a0ca57f53808.pdf
- https://static.usrfiles.com/ugd/b8c837_762b6dbac868490a9eb1d82683b1ecc1.pdf
- https://static.usrfiles.com/ugd/55f640_d4f1e7d6e113458aa326b2d580f08a72.pdf
- https://static.usrfiles.com/ugd/de3d83_c61265f90e0249389d981f8072dd0fd4.pdf
- https://static.usrfiles.com/ugd/ab0441_0e302b03a3cd43169cc033fc1655c20d.pdf
- https://cdn.shopify.com/s/files/1/0435/5283/3695/files/9356527350.pdf
- https://cdn.shopify.com/s/files/1/0428/8859/3571/files/tawitafuwotokovupi.pdf
- https://cdn.shopify.com/s/files/1/0431/5702/9018/files/dxpxox_dad_xname__x.pdf
- https://cdn.shopify.com/s/files/1/0431/9795/6258/files/8071133786.pdf
- https://cdn.shopify.com/s/files/1/0438/3696/5026/files/kafaxilo.pdf
- https://cdn.shopify.com/s/files/1/0432/7938/4736/files/38896422025.pdf
- https://cdn.shopify.com/s/files/1/0459/7311/0951/files/6687912353.pdf
- https://cdn.shopify.com/s/files/1/0437/2388/2664/files/kawegiwelirodokisaxus.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004e8b.bin` `d8b86f8ff0fc4aad718989c4be8178bf48ade01c4248a58153342152cfa1ed99`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E8B	5060 bytes
`font_01_sfnt_off00005fd2.bin` `d46686f5b8eac7e9128c3297fdcfc0bed847fac573ad99331ff55ff016248d9b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FD2	12872 bytes

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