PDF malware analysis — malicious · afb20bed74f06194

MALICIOUS

PDF

34.7 KB Created: 2020-08-31 03:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06cb1d0e6faf19f05719666f74411844 SHA-1: b311e36539e715ac71feef9055cc17a95a9b7817 SHA-256: afb20bed74f0619433fb4eb11738f81ff9e30a197552e2636225f8334268c14a

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large PDF link farm. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=music+video+proposal', which is likely used to direct users to further malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on 'static.usrfiles.com', suggesting a coordinated effort to distribute malicious content through a link farm. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent related to redirection and potentially phishing or SEO spam.

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/wix?keyword=music+video+proposal
- https://static.usrfiles.com/ugd/b8c837_cf26840b3271456e9800660efd4b4d8a.pdf
- https://static.usrfiles.com/ugd/77d535_5f5c7e5f40d34fcd94646ef7217bfeae.pdf
- https://static.usrfiles.com/ugd/1f6d71_96a7bb57980442a9b71a412f932be587.pdf
- https://static.usrfiles.com/ugd/d4a9d6_4ecb3276cbdd472586ed07a5bfaee03a.pdf
- https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
- https://static.usrfiles.com/ugd/b8c837_1f3280a7840346168bfa1539943b65ec.pdf
- https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
- https://static.usrfiles.com/ugd/538d67_8db464246945462a908b72db9501db21.pdf
- https://cdn.shopify.com/s/files/1/0436/0273/9362/files/67893974949.pdf
- https://cdn.shopify.com/s/files/1/0429/8624/2209/files/bimewibarawalesamobiko.pdf
- https://cdn.shopify.com/s/files/1/0434/4823/8236/files/50460432381.pdf
- https://static.usrfiles.com/ugd/b972d5_8291351bcf1f483e89dd09f61d3fed71.pdf
- https://static.usrfiles.com/ugd/b8c837_6488a0cfe728435b831603c2fb947484.pdf
- https://static.usrfiles.com/ugd/c3f88d_de905425c64046e3887f3c669298fabf.pdf
- https://static.usrfiles.com/ugd/a2e20a_051aa901432e4157bbe463d2117f44dc.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_off00004c30.bin` `324f534882771c853d6f6c6c2faa781b923bab061a54886acdb0f82cac331bf9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C30	5132 bytes
`font_01_sfnt_off00005db7.bin` `64208bad3aaa881a0f3fedb6f62c338c950961577325ad7ecc8d04d8bc5b75ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DB7	9528 bytes

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