Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f36acbda5df43cf…

MALICIOUS

PDF

45.4 KB Created: 2020-09-21 17:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 496f2e63f0ac8b9daa2bb8c86dc9ae1a SHA-1: 07998b55ca7ea487689f569f4c33ec294d3483fb SHA-256: 9f36acbda5df43cf6d9b98f17996c8702de6d7051feffbc40d32d94bce4de752
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=interpreting+pie+graphs+worksheet'. The document body also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The overall intent appears to be directing users to malicious infrastructure under the guise of an educational worksheet.

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.link/wix?keyword=interpreting+pie+graphs+worksheet
    • http://files.darbsterdog.com/uploads/1/3/1/4/131409210/6511875.pdf
    • http://files.divinehorsetack.com/uploads/1/3/1/4/131453188/mamukogu.pdf
    • http://vudotuvo.foreverlivingdeliciously.com/uploads/1/3/0/9/130969926/nabege.pdf
    • http://guxaxeb.maestrodonappert.com/uploads/1/3/2/3/132303354/kajakozokezan.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/35479602600.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/godokato.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/nimusolodumamavevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/center_parcs_whinfell_forest_map.pdf
    • https://2167ba3f-1391-4a37-8cde-9b7d8b8ddacd.filesusr.com/ugd/2eec94_566c4cff6a24478aa2ea67f5f4e2a058.pdf?index=true
    • https://f89bb034-b430-4dc3-ba17-0f3d7e984511.filesusr.com/ugd/3cb679_af715f6841704a1b9a44268b8be6c3d9.pdf?index=true
    • https://b3a952f7-4140-4b99-9ec5-1839b9ec7054.filesusr.com/ugd/d7d6cd_e01e31f7addd4c86872195642baaa578.pdf?index=true
    • https://29d43299-f479-4d2f-8d32-c6b476f518ea.filesusr.com/ugd/7dd30d_2a44ed3ed7dd4f979b04e330ca5e5479.pdf?index=true
    • https://a4e4b06b-d16e-4be2-ab89-d9a4cb5e5a02.filesusr.com/ugd/23a6c3_18c2ff7d71e14544a9d05ed54bac7787.pdf?index=true
    • https://06019e5b-719b-4da6-802d-e5235643fedb.filesusr.com/ugd/2994dd_91b0146561ea4912870960356623fbaa.pdf?index=true
    • https://d0a1c165-e78a-4464-a9a1-8facee87e79c.filesusr.com/ugd/3eed2b_4ea03b45ce664f9f9cbe2eef7820c67b.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_off00005dc0.bin
664aa0410901fd77f814ce55561756d6ec9b5943782a7ed13c5b42557d04ea12
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC0 5144 bytes
font_01_sfnt_off00006f4d.bin
aa7ee594cc436abe5ddc1f743e99dfeaba9efe5f644cb8b1bc48f4f492a1cf89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4D 10564 bytes
font_02_sfnt_off000093a9.bin
4a83d890a47edb08c66ed977e452dfc2aca54227ac21f6fa21ed0d0aaea40951
pdf-font-stream PDF embedded font (sfnt) at offset 0x93A9 16116 bytes