Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f9633b49acc346…

MALICIOUS

PDF

45.2 KB Created: 2020-08-19 11:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85f7f23472a3f989447b6a3bc8c59fc5 SHA-1: 352a7079837e4826740d44966ea99f2dc65308a6 SHA-256: a8f9633b49acc34639c710a66058cc725d5c8151ed71586ff0123f5731c86389
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of a link farm further suggests a malicious intent to drive traffic to potentially harmful sites.

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/pify?keyword=calculation+for+design+parameters+of+transformer
    • http://files.colquittcountysaddleclub.org/uploads/1/3/1/3/131398097/1e80a9d3c10.pdf
    • http://monuvage.amplifiedoffice.com/uploads/1/3/2/7/132712572/mibaxepazewi_kuvitigujafos_wuwururan_vededatudag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4316/files/51718067463.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/analysis_for_office_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2824/files/rodomidodubulebixan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/xofetapanitutanunowine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/33771407072.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/pesineguvunaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0464/1783/8248/files/unifix_cube_volume_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/free_printable_first_grade_math_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/lekojizixudesewe.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_off00007233.bin
73186da8e2a90b3076071ceba52f7868a87adbb03c91a86a90e25993adcaf105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7233 5380 bytes
font_01_sfnt_off00008464.bin
d848c7097e77ca5945445f338496ef9644f057718db52c776849414486f93e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8464 10496 bytes

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