Malicious PDF — malware analysis report

Static analysis result for SHA-256 8188100dca65a04f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 20:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f008b4a2cff81cd5455276d1c25f269 SHA-1: e9b7e2a1cea4ba5b300bece232f340a056ee027d SHA-256: 8188100dca65a04f54d7609fc09a991f2fb3ed0f7943f6d4b823de6dfc94d79f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially corrupted, contains text related to a 'Caddo lake bream fishing report' and includes the malicious URL. This suggests a social engineering lure to redirect users to a potentially harmful site.

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=caddo+lake+bream+fishing+report
    • http://files.artbyminh.com/uploads/1/3/0/9/130969300/nesukowugubob.pdf
    • http://sigexe.imaginationtoimagery.com/uploads/1/3/0/7/130739048/pinaze.pdf
    • http://files.thevamcommanders.com/uploads/1/3/0/7/130775623/8594934.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/biomedical_waste_management_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/49991769497.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/lecture_notes_on_advanced_abstract_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/technical_communication_10th_edition_mike_markel.pdf
    • https://cdn.shopify.com/s/files/1/0448/2806/5949/files/bacteriologia_clinica_libros.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/57802659099.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/54616309164.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/97038758629.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0528/files/puvowuravofozavik.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/bavikirid.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/zanox.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/greensleeves_clarinet_sheet_music.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_off00006b98.bin
4a51aad593a8a3e345991e00cc203f314367a82b5895e1dd32221fc6f643d851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B98 5564 bytes
font_01_sfnt_off00007e5e.bin
3c517f868b4fa7da0035aced3ca448a00edc6893f6eb7dbe4d913b7829cfcaa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 10180 bytes

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