Malicious PDF — malware analysis report

Static analysis result for SHA-256 59da87b9c60a01ff…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 14:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0c55f1c50e27c548a6ae517da64177 SHA-1: db496a0c29791d9fc3f6eb4c6b931c95d2204a18 SHA-256: 59da87b9c60a01ffcfb31389992fb740059154d570d01faad3d79473b6dcb739
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a lure for free movie access. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary malicious IOC is the redirector URL, which likely leads to further compromise.

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.club/pify?keyword=chocolate+movie++free
    • https://static.usrfiles.com/ugd/a91264_ae1a0158bf914280a0a3f8b956cf713a.pdf
    • https://static.usrfiles.com/ugd/e5a943_a5902fdb96ed41d591adf25d271963a9.pdf
    • https://static.usrfiles.com/ugd/21e6f2_f8d897ebf3d44f449cb4fc3b8ea3a445.pdf
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/dagivi.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1c55af24b0a4521af701ff3025378bd.pdf
    • https://static.usrfiles.com/ugd/ec0c41_f1d923662ccd4460a3a0e1077c3e4a40.pdf
    • https://static.usrfiles.com/ugd/b8c837_c951c817625f4eaab032288f870db976.pdf
    • https://static.usrfiles.com/ugd/70a38d_55fbb55d291b4b97b87e4cc6a3e9028d.pdf
    • https://static.usrfiles.com/ugd/d17951_2ca6a83567ff4059afb7172da94f7394.pdf
    • https://static.usrfiles.com/ugd/8b2c09_1e29557f5fd047588e7eaba597ce7dff.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_off0000505e.bin
d8a5ebc31e7d1d3d4e55262cdcf17223eafd95da54020c81a3dcf6376b197e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x505E 4908 bytes
font_01_sfnt_off000060eb.bin
ba1b7aaabb0a73e7ece5c41c61eb13b93c6dc4416daafebbf1a5605b3ec83efb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 20268 bytes

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