Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e799a5f1a35338…

MALICIOUS

PDF

47.5 KB Created: 2020-09-06 00:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bf9826f8a0bade38b1fcb139d899ab1 SHA-1: 59b13eed5ba3f00b4dcc8ad9d17ebf1e10ffd6fd SHA-256: 47e799a5f1a3533861ffc2db49483eb7a6a7729828b454575e8ffdd9669545ea
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, disguised as 'algorithms for interviews pdf', redirects to 'https://ttraff.club/wix?keyword=algorithms+for+interviews+pdf', which is flagged as a malicious redirector. This indicates a social engineering attempt to trick users into visiting a potentially harmful website.

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/wix?keyword=algorithms+for+interviews+pdf
    • https://static.usrfiles.com/ugd/b8c837_48ef981763f14e7cb887befc3eb6581d.pdf
    • https://static.usrfiles.com/ugd/b11f6d_1040ae89946a4aa58007a16c7a5932b0.pdf
    • https://static.usrfiles.com/ugd/b56239_1ed68322f95f421d886d77226a007d4a.pdf
    • https://static.usrfiles.com/ugd/5bb01c_b9fd83c5fc1f471eacfb778b1994cb1d.pdf
    • https://static.usrfiles.com/ugd/d63aaf_9c44344ffbfa4176b10fae3c80d614a7.pdf
    • https://static.usrfiles.com/ugd/205ae4_af7cea5d9c594835acad6d00d39bf6d2.pdf
    • https://static.usrfiles.com/ugd/fe83c3_2aae234828ca4ca488463c635421cbf1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/gaxomujumomumoni.pdf
    • https://cdn.shopify.com/s/files/1/0460/2255/7855/files/logitech_gaming_software_arx_control.pdf
    • https://cdn.shopify.com/s/files/1/0440/7010/9334/files/37282108586.pdf
    • https://cdn.shopify.com/s/files/1/0437/5494/6721/files/sanitetijuwekubegewurij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/xulirisejorumotapixenewa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006340.bin
9f6db537fa0959221da199a9e39b6c809ebc1ec536d5f5fd726c056facf5e552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5172 bytes
font_01_sfnt_off000074c6.bin
2498f3ab4ec90b07d01bda4bde11cf72fbc3985e0073a06084ae0d487615948e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C6 14592 bytes
font_02_sfnt_off0000a34a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA34A 4324 bytes

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