Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec28191fec6c58c8…

MALICIOUS

PDF

46.8 KB Created: 2020-08-31 10:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ef90e36e86a81ba22ce82f86a3e530b SHA-1: d68815bd9deac5ac43c9c2f5399cdf517bd7c6bc SHA-256: ec28191fec6c58c806876f557b75daeaf528c791672c46421477e767c92e89e4
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious site. The document body, though heavily obfuscated, contains the same malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the link leads to known malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=djay+pro+windows+10+crack
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/pimadol.pdf
    • https://cdn.shopify.com/s/files/1/0440/7279/6325/files/rinetose.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/fajazuvekobenifefo.pdf
    • https://static.usrfiles.com/ugd/b8c837_0852081b39c14d01beebae5b6fbdd89e.pdf
    • https://static.usrfiles.com/ugd/1d64af_0d05bdc0d9b444228ca180bcf3dd8762.pdf
    • https://static.usrfiles.com/ugd/9b33c5_2246e61f073242978410d3d6b3a41fbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd9d5ca1546f425fb01233295b19e73b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c206f1c44d043f999a4bb4ab4a159e7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/texis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/animal_reproduction_worksheets_for_grade_5.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_off000077c0.bin
57b62a9f4a397b38c14bc8023366975cc8c952b3f945e148e64a92cd80183f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 5564 bytes
font_01_sfnt_off00008ae1.bin
9841650d7fbca38c8b0c7507cccd971e70b2ad6db4e0c17e90f8672074489af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE1 10440 bytes

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