Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53d77962e368aa8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 15:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82e3c7ceeaac6978f7a967839ff79aee SHA-1: e25706ff350471c26db5c1f06e5e015877c28eae SHA-256: e53d77962e368aa8c8c294422d65597a9394ee9beda006b0ff096304d50c57b4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.com/pify?keyword=excel+vba+macro+copy+cell+format', suggests a social engineering lure related to Excel VBA macros. The document body, though heavily obfuscated, also contains this URL. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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/pify?keyword=excel+vba+macro+copy+cell+format
    • http://files.milinclinic.com/uploads/1/3/0/7/130775974/2785443.pdf
    • http://nemob.alcuincollege.com/uploads/1/3/1/8/131871864/f35a322b.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/watatizilunexokowemerabe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/wipitoko.pdf
    • https://cdn.shopify.com/s/files/1/0441/1280/6040/files/66411788443.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/fuvosiximopimugolitotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/simple_tools_and_techniques_for_enterprise_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/4242/2440/files/fasotinafikatoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/48934454026.pdf
    • https://cdn.shopify.com/s/files/1/0428/3174/1095/files/andres_bello_poemas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/potezizotubikel.pdf
    • https://cdn.shopify.com/s/files/1/0448/1240/2839/files/49586071815.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_off00006312.bin
28c05029f49aaafd932f6b3cbd37e111aedd3158f01abfab1b19a35383e02491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 5308 bytes
font_01_sfnt_off0000751c.bin
6eab7cc4af808e80b2b3927a96559ee163d6067a98be128489f9e63d9972aef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 11612 bytes

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