PDF malware analysis — malicious · d1d516aa7767270d

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 20:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8bed29f4b8c9560cefa195d54417df51 SHA-1: 465abbaf0b2ffd760788140dab5ec66fbb8e6a7c SHA-256: d1d516aa7767270d98c9ce190733cd33b0ae5045af875a1540f1b4675ec4802d

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/wix?keyword=analog+clock+pictures', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links hosted on 'static.usrfiles.com' further supports the link farm heuristic.

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/wix?keyword=analog+clock+pictures
- https://static.usrfiles.com/ugd/b7082a_c8f10812e09d4a22a5d83894e2348c68.pdf
- https://static.usrfiles.com/ugd/9b33c5_a2e8412f2a214ed49f1374d3d984e430.pdf
- https://static.usrfiles.com/ugd/d9d1f5_50fbb9434f26406fa2c5bcdc7f70b810.pdf
- https://static.usrfiles.com/ugd/b8c837_46a560164ed24750b3b965e884e7aac6.pdf
- https://static.usrfiles.com/ugd/538d67_c12ccf2f755b45c8ae297c3e1680f7f9.pdf
- https://static.usrfiles.com/ugd/b47706_c1a5aa2a88c3470999b7733efa714c8c.pdf
- https://static.usrfiles.com/ugd/6f9b04_faa201b78b1640c28dfd1b7844fca6ae.pdf
- https://static.usrfiles.com/ugd/b8c837_4a12b8c2a6b14c78b162a8183953af0f.pdf
- https://static.usrfiles.com/ugd/08fe48_6d8d63d1af8c481da07718e376870630.pdf
- https://static.usrfiles.com/ugd/b8c837_bf44151e82ed436e9b3b3569e274bc84.pdf
- https://static.usrfiles.com/ugd/895bef_2c9bd3eb562f47448919e2d2a1787a4e.pdf
- https://static.usrfiles.com/ugd/b8c837_f2a6e93f746349e2a2f916509cd70a79.pdf
- https://static.usrfiles.com/ugd/1f5cef_777a3edc8a0440909e4b0aff3060a8ae.pdf
- https://static.usrfiles.com/ugd/b8c837_85a02cd4e13f44c7a75ca7189ebe6650.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_off000065fc.bin` `2b7d4e0086fb280a24276ec678a769c0f3927be1730e9268c8f4eb8bbedc2228`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65FC	5156 bytes
`font_01_sfnt_off0000779c.bin` `f9022352b01c1e7bcde3d4a38f663ee93c23dd76660fd7052086b2985b5a89a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x779C	10412 bytes

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