Malicious PDF — malware analysis report

Static analysis result for SHA-256 9508874caea42ff4…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 13:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4763df18e312af152397ce109add50e SHA-1: 37b25e2f7d86c665261dc5f29e4edf99d748f114 SHA-256: 9508874caea42ff4f69030a01e09697c84fcfbe0b0b48f4025469b63b90d2618
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=ab+525+drive+manual'. The document body, though heavily obfuscated, appears to contain text related to a drive manual, suggesting a social engineering lure. The presence of numerous external PDF links, many pointing to benign content, is characteristic of SEO link farm techniques used to obscure malicious activity.

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.com/wix?keyword=ab+525+drive+manual
    • https://static.usrfiles.com/ugd/b8c837_eab1f5ba57d3473eb3ce059b61ccb77c.pdf
    • https://static.usrfiles.com/ugd/8ab72e_46f1aeb8bb6b4735ba73a0da244ac5dc.pdf
    • https://static.usrfiles.com/ugd/ec0c41_e860e70eb6d74e5bb87987d7873724ec.pdf
    • https://static.usrfiles.com/ugd/f55bec_ad15721b133c44688f9647e66fe04d63.pdf
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/10435243062.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/wulijelajusibevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/jizunikuvelegagam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/vivepojogozonoweniz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/aquelarre_rol_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/1484552110.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cc9a21817e24df2867177d881349732.pdf
    • https://static.usrfiles.com/ugd/b4a829_d5121151b1714de5b7115129dd690305.pdf
    • https://static.usrfiles.com/ugd/7598fa_04bc97a368bf4784a328a673a5eb5ffe.pdf
    • https://static.usrfiles.com/ugd/b8c837_62a5d968ecc846639d3de5cc1a6faf2a.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.

FilenameKindSourceSize
font_00_sfnt_off00006173.bin
df043fcae78e0123544d084ed1bfccfff33cb182a7902ddcd810aaefa9895eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 5236 bytes
font_01_sfnt_off00007337.bin
977eafde7e4bf4c98ebf86e1fbda2d21c13b63f5b5a3338c6b50b74f7e9ea3a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7337 9984 bytes

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