Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57b56fc8d11ed59…

MALICIOUS

PDF

72.4 KB Created: 2020-09-18 06:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4396e195d80def0446fc80f0697f6231 SHA-1: 1afd630e8b9cf01aeecc91cb54f39428cf98e184 SHA-256: c57b56fc8d11ed59002dca3dbc240cef1ea774a091745d94cce7e2eca9f4d68b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL disguised as a worksheet answer key. Additional heuristics indicate a link farm, suggesting a broader campaign. The embedded URL https://ttraff.me/wix?keyword=atoms+elements+molecules+and+compounds+worksheet+answer+key is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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.me/wix?keyword=atoms+elements+molecules+and+compounds+worksheet+answer+key
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdf
    • https://e36adbab-d048-4630-b6e6-bb903b305cf3.filesusr.com/ugd/062c90_a39d4e1045ab457da55f401e31e5e322.pdf?index=true
    • https://0c5378bb-89f8-4e17-b130-deee3f3ca3c7.filesusr.com/ugd/762c1a_a59c11753a044e66af471a95b50c54ef.pdf?index=true
    • https://b9c03409-4293-4929-8509-3c006d319c5f.filesusr.com/ugd/ced2dc_639e2347d6a34c5cb14a5252967a550c.pdf?index=true
    • https://a67a7b8d-3810-4a2c-b932-1dd31c6abdec.filesusr.com/ugd/95089d_be4b3592d41540f180f27d92f2b76fd8.pdf?index=true
    • https://f7f75382-d9db-4086-9cd1-c1c4ab212a4b.filesusr.com/ugd/895bef_acef06cfd3774150ac1e0a3026920549.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/photoshop_photo_collage_psd_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/dupinigo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/gobagojas.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/61486950630.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd05.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD05 2828 bytes
font_01_sfnt_off0000d700.bin
783d11cab1aca1f42c6b08cc55fcaa92055cb952b5426abd3bf73644d860efe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 5560 bytes
font_02_sfnt_off0000e9d5.bin
311a48816d723cfaa78560f366dfdf1a5c5d8d9c701e24a2dda622bd58f4dc17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 12472 bytes

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