Malicious PDF — malware analysis report

Static analysis result for SHA-256 c087f539c7e947db…

MALICIOUS

PDF

45.6 KB Created: 2020-09-17 14:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03450dd17839fc26aa576a4d2b98522b SHA-1: bb7a5b0601d9dd1450cfc6df8cf10f736fe0ae65 SHA-256: c087f539c7e947db7e152c5b60d63c3b16114b6e01d91de8d72ce3a06568d844
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a strategy guide leak. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document's intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=sword+and+shield+strategy+guide+leak
    • https://6f5b076f-0c4a-4d9b-9de0-b88cddd51852.filesusr.com/ugd/9c66ff_64bdf1b4dd0d4c92af3dba66b925c5b7.pdf?index=true
    • https://8373f743-767a-48a4-bb4f-4031e8e7dec0.filesusr.com/ugd/e6092c_bff3d8b4cf4547f6b0c203273b35f8b9.pdf?index=true
    • https://989961f2-dfa5-4ee2-98ba-53385edc4f57.filesusr.com/ugd/17159d_d3ee33d359544b608a112eb4870aa477.pdf?index=true
    • https://65c64b3b-ed10-431b-8bf2-e38b0894aab7.filesusr.com/ugd/585b1d_6c8f130d53d446f88312143ba9f94331.pdf?index=true
    • https://e075acfc-4bd7-4066-ab27-cf32ded3eedf.filesusr.com/ugd/dec231_46a1e2ae8a374feb93e473d81f7d97ac.pdf?index=true
    • https://0b2121a8-8764-46b1-a229-417f3ef431f9.filesusr.com/ugd/952c2e_5e66a295e82647e6a3e7f4aa028c1fa4.pdf?index=true
    • https://af266999-8553-4555-86bd-9a3d79c24fa9.filesusr.com/ugd/9ff9b8_7bb3ee1b7ba74506b81a002e86ab19dd.pdf?index=true
    • https://4f321a25-cd10-4206-9544-5d8e8b81839a.filesusr.com/ugd/bdc04d_52793397cc274bba9bbfcde3f16cf39c.pdf?index=true
    • https://c62e5721-92cf-445b-9345-6d7359feaf66.filesusr.com/ugd/d31907_cbae6485e53e412eaa7abb4d512a40a3.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/91663493660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/12023505022.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/49000012259.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0328/files/aankhen_2002_movie_video_songs.pdf
    • https://3001853e-e422-483c-a9ac-28dbbe83b439.filesusr.com/ugd/d162e3_3209c575266b44aebcc4c3c59d57144a.pdf?index=true
    • https://2fa5943a-a600-4aeb-94d2-e7a5c387acef.filesusr.com/ugd/595093_c2c1f181d6c045cf9142df297cabc4ad.pdf?index=true
    • https://3535b5dc-8eca-4541-b12a-e5166884c38b.filesusr.com/ugd/bf0735_502a4768513b4584a0de91741e3bd5d6.pdf?index=true
    • 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_off00006670.bin
93d0a2ae5a61efccf423575c517adec6428ec928f48cda36da3fbc38ae1734f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 5328 bytes
font_01_sfnt_off00007893.bin
117aa108ca86c09c8d6a6d965d5fe89b05752e0a1133551fa0584986aed143be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 10192 bytes
font_02_sfnt_off00009b6c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6C 4324 bytes

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