Malicious PDF — malware analysis report

Static analysis result for SHA-256 b765c0735fe5531d…

MALICIOUS

PDF

48.7 KB Created: 2020-07-09 01:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ada43adec9412f8c1f091a7b4df6490 SHA-1: 9d30b524682bee4da0fb403d2030518b90d132ce SHA-256: b765c0735fe5531d6909a83a3c1c5ddfe87eec9e623cbfda3332b404c722883f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'irony worksheet' which redirects to the malicious URL https://ttraff.com/wb?keyword=verbal%20irony%20worksheet%20pdf. The presence of a link farm heuristic further supports the malicious intent of distributing links 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.com/wb?keyword=verbal%20irony%20worksheet%20pdf
    • http://files.vibrationsforlife.com/uploads/1/3/1/3/131379371/powagojowa.pdf
    • http://files.soulfulnesstherapies.co.uk/uploads/1/3/0/8/130814535/4145075.pdf
    • http://files.quantumpoint.org/uploads/1/3/0/8/130874031/fexurugomaseba_livorejalolokib_kuluvewowa.pdf
    • http://files.bethelpenclawdd.com/uploads/1/3/2/6/132683069/b230a64bb7eb.pdf
    • http://files.rebeccaseaberry.com/uploads/1/3/1/4/131408241/petikeb-zifilig.pdf
    • http://files.downtheroadwellness.com/uploads/1/3/1/6/131606155/dufesulobomuke.pdf
    • http://files.yashbangera.com/uploads/1/3/0/7/130738625/83486b04a35.pdf
    • http://files.hopskipserve.com/uploads/1/3/0/9/130969298/dipejizuboja_raxijuditu_vafabazimeni_teduloxuguguzu.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • http://files.hallielee.com/uploads/1/3/2/8/132815961/5788720.pdf
    • http://files.hallielee.com/uploads/1/3/2/8/1
    • https://xededad.files.wordpress.com/2020/06/14416926991.pdf
    • https://samutalitu118446218.files.wordpress.com/2020/07/84934913919.pdf
    • https://vusipubaze.files.wordpress.com/2020/06/62965798229.pdf
    • https://lolanif.files.wordpress.com/2020/06/40594100480.pdf
    • https://numewim.files.wordpress.com/2020/06/76869682205.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.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_off000080e0.bin
2b9832479bcf77812ba296a63c077b5cc11f9f20a3404cf321386f6ff221bf89
pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 5280 bytes
font_01_sfnt_off000092d4.bin
f51b99c7b5bdb8078c65e745fb26dfd403810e5f051b1208dd8a4b83c3c2b288
pdf-font-stream PDF embedded font (sfnt) at offset 0x92D4 10192 bytes