Malicious PDF — malware analysis report

Static analysis result for SHA-256 d958bfed0abfc400…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 04:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e25d5d2ad6b0ca11bcab14fb853bb8e SHA-1: 7c114e92bebfc4719509c7ea58319c48d80ab030 SHA-256: d958bfed0abfc400cfa74956de5783e86c4cb7656a746dd442f614f8fc264158
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a mass external PDF link farm further suggests a malicious intent to direct users to potentially harmful content.

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.cc/wix?keyword=eclipse+interactive+worksheet+answer+key
    • https://static.usrfiles.com/ugd/b8c837_5feaceab535f40989b1c48f2273993c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32925c4c4944104ad021826a9565fad.pdf
    • https://static.usrfiles.com/ugd/0df15e_25c3ac597f0d4aed9e07ba3dba4f823c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5174e7def6a94be988f14b32e2cadd09.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11b58d3bf9745a9a4d485a727bd02b2.pdf
    • https://static.usrfiles.com/ugd/a771bd_b527de36eb2e4bfc905f9f737b504666.pdf
    • https://static.usrfiles.com/ugd/b8c837_01abae187c814641bd7c5b67a3d3278f.pdf
    • https://static.usrfiles.com/ugd/b8c837_92460ea311c6494fae54c155528fd7d6.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_off00006570.bin
022e18eb93f5bcb91a81fad41b2cdd14afaf495c08aa2e9f6653f8fd9a431701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 5084 bytes
font_01_sfnt_off000076bd.bin
adcee4bc2174cc08f9dbe63dc58d0d428b4043dc396c5f2f1b9f1698102acc4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 10276 bytes
font_02_sfnt_off000099e2.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E2 4324 bytes

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