Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c1f69d7492bea1…

MALICIOUS

PDF

41.9 KB Created: 2020-08-16 00:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf8a2c0bdcd05398773a077ad61d0d8 SHA-1: f43ccf7c1fef26c96439b8665f2d0ca6252bd52c SHA-256: b3c1f69d7492bea13c395e319c3f970463de8ecf608490f0f18c01659d4d3af4
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.com/wb?keyword=how%20to%20speaking%20english%20fluently%20pdf`. This technique is often used to obscure the final malicious destination and to improve search engine rankings for malicious content. The document body, though heavily obfuscated, contains references to the topic 'how to speaking english fluently pdf', likely a lure to entice clicks on the embedded links.

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/wb?keyword=how%20to%20speaking%20english%20fluently%20pdf
    • http://files.instylelandscapesvic.com/uploads/1/3/0/9/130968934/vesoxabuzu-wexexowe.pdf
    • http://pejiru.zeldadoll.com/uploads/1/3/1/4/131453109/1149980.pdf
    • http://files.little-childrens-bible-school.com/uploads/1/3/1/1/131163920/7696274.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/95126128964.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/87074462124.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/bolududedarabazowur.pdf
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/71100063338.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/38361480165.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/49670286867.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/xadapekonekoxuzomuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/80097158411.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_off0000653b.bin
a46c164fd0a00af13a78eb44347462d737feb569d86de544cf8dfbf406b952cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 5424 bytes
font_01_sfnt_off000077c7.bin
71a02fafdd5778162070aec15264af13ae835d3e0a3cc1b6eb43cf9c380d6577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 10412 bytes

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