Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ec78d5186c09b8…

MALICIOUS

PDF

38.5 KB Created: 2020-09-18 02:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f1d6dec0d83f4a9617987e5804ee2b6 SHA-1: db83c64a4ed2e3b8f64f2715a2057b9ae63b9a12 SHA-256: b1ec78d5186c09b82ad8833b8be2badeab4ffbe6d71b4e5cfb0bcb172b615142
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This indicates a likely attempt to direct users to malicious content under the guise of product sales. No scripts were extracted from this sample.

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.club/pify?keyword=red+wing+8111+sale
    • http://files.dyw-edinmideast.com/uploads/1/3/2/7/132740186/bogupuruzine_piruzogedudazag_regabu.pdf
    • http://files.seanstrees.com/uploads/1/3/1/4/131482975/rumaf-kufigawusabeka-vuziro.pdf
    • http://dazufebu.gemscraft.net/uploads/1/3/1/0/131069921/kixezijiz_jemuxuguzexe_serokikip.pdf
    • http://files.blackdogarts.org/uploads/1/3/1/1/131163833/e65b16.pdf
    • https://7d6af513-243a-4992-b16f-b97c09b8967f.filesusr.com/ugd/48f461_6e10a7f0fc5d4d28a63c6f68adf3410c.pdf?index=true
    • https://cb391ffa-7e34-4cc1-97bc-7288c5fd9010.filesusr.com/ugd/7ea8bb_390cd114023d4d3f93b1231a3099b961.pdf?index=true
    • https://ee34b4e3-a91c-4f5c-9e72-29372e29bc4c.filesusr.com/ugd/e7e4a0_87b527386ecb420baf7d454cfe996ff9.pdf?index=true
    • https://92bff9a4-fbd4-4266-a80d-b4e455bfae05.filesusr.com/ugd/b18e4d_c5ce241668e2494f9105ddf0d8a34628.pdf?index=true
    • https://1e5caf43-6fc5-4137-8b67-243c5286820b.filesusr.com/ugd/163759_3d3948a2196d44a3a45ee1178b5cf41b.pdf?index=true
    • https://705a8604-558c-419e-b61f-4014f8bb4542.filesusr.com/ugd/45fd81_2e7fe2f85b55468a9a47a45bb873bb05.pdf?index=true
    • https://eaaaa2fb-e6c4-453b-8eb7-5248a6d24310.filesusr.com/ugd/cdfdba_808eac4cac6a4a11ac8407dd4d106c38.pdf?index=true
    • https://aa49d500-29e5-4505-b339-b9eb97ec10da.filesusr.com/ugd/9b7d8a_168caa6377e7424cb2d8c430eb1e2724.pdf?index=true
    • https://b79d7d34-612e-4001-a89b-24008e3871bd.filesusr.com/ugd/4bdc6d_ec0d49ad2d594baa94e6af3555b8d509.pdf?index=true
    • https://b7e8b33f-0b28-4d6c-8f24-a24788fb61c3.filesusr.com/ugd/4cf28d_286fa1f4da1b458884d077311584e681.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/vaxavoki.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/4376586787.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zopebaxixatewoxekiburuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/geographical_location_of_china.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/free_oregon_promissory_note_template.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/
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/geographical_location_of_chin

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb8.bin
1a52ae5f0e05589015fefc6d68f1e626918690a5650c04088e421a381ecd6073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB8 4840 bytes
font_01_sfnt_off00005d3a.bin
88f5f49b7adc8aa86b379f2aaa32fe1ec79a682cae41b352b9ad279b5476926e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 9860 bytes
font_02_sfnt_off00007efb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFB 4324 bytes

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