Malicious PDF — malware analysis report

Static analysis result for SHA-256 a186d60cce18516e…

MALICIOUS

PDF

49.8 KB Created: 2020-08-24 16:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e904fc61112e16eb3e2c4839e5752b5 SHA-1: a51fc823bc83b435c4a98d91de90e2cd6e41b890 SHA-256: a186d60cce18516e770e4ccb54a7db1dcfe580228999e5a0206f1f424151160b
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as a worksheet, designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=interpreting+box+whisker+plots+worksheet. While the document body is heavily obfuscated, the heuristic firings clearly indicate a link farm and redirector strategy. No scripts were extracted from this sample.

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=interpreting+box+whisker+plots+worksheet
    • http://vukope.truelight-photography.com/uploads/1/3/2/3/132303027/luwawone_lufizef_famemimidere.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/23386624644.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/76007893617.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/direbesipun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/66106562333.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3293/files/nivunatubewaxipefupofuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/56108133701.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/31141829806.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/lines_composed_above_tintern_abbey.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.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_off00007e86.bin
22d3a96ffdef86fdbcf68ae383ca37be13f620a7accdcdbac94fa9e3869ab6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E86 5172 bytes
font_01_sfnt_off00009027.bin
6c40dc7f299ee8dd888fe5dd78e86bafc3271a7906d14a47ab1820814267dbbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9027 13592 bytes

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