Malicious PDF — malware analysis report

Static analysis result for SHA-256 5011eef9a323e345…

MALICIOUS

PDF

41.4 KB Created: 2020-09-17 04:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02985aaadd94b158fe0d13686b3500b4 SHA-1: db7faab0f6171fea3846ec9e97bbe8c782d7046b SHA-256: 5011eef9a323e345674ab267981a6a0b2aeb5ad23d594d07195a55f896401c72
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is 'https://ttraff.me/wix?keyword=hollis+upper+elementary+school', which is likely used to lure victims. The document body contains obfuscated text and references to the wkhtmltopdf tool, suggesting it was programmatically generated to host these links.

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.me/wix?keyword=hollis+upper+elementary+school
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/mp4_video_converter_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/aluminium_composite_panel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/fewevitoxajeximelubabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/cisco_csr_1000v.pdf
    • https://c2f1c814-b4e1-4763-8f3e-7d9dd8a717ef.filesusr.com/ugd/bb05c1_dfb1a16a3a444747b2407d31184b74b3.pdf?index=true
    • https://00f4c266-eca9-426a-ad95-7ab01d305740.filesusr.com/ugd/1e4819_44b4f431f75c4e75b2e14b56aea30fde.pdf?index=true
    • https://87ed88b8-e5c4-4ee5-a525-a4d56549c501.filesusr.com/ugd/c88839_f699646d639f4b788fe3885a22f4a4c0.pdf?index=true
    • https://690fe2ae-7452-44ff-b09a-830313ea17e3.filesusr.com/ugd/90661f_bdbe8c69f03448f7aca838e7833dd42c.pdf?index=true
    • https://00c23021-6cb5-45c2-bb99-728535c93efe.filesusr.com/ugd/28b3f7_79e112ecee4f4b40a8006aada566c974.pdf?index=true
    • https://60c4eea2-872c-498c-8280-617bb2ab6f3e.filesusr.com/ugd/a98ecc_76c94f8b8e734db6a43d8251c02131f3.pdf?index=true
    • https://96356816-63f8-4ee9-b5df-dd722fb2d556.filesusr.com/ugd/7baf93_11a1db5e55444ad3ac037ec6f57a8e1a.pdf?index=true
    • https://fa60375f-7c6c-44b9-b230-7e252d766b78.filesusr.com/ugd/a9248e_eb299cc1ef974f6abaec799c766ee436.pdf?index=true
    • https://a869dd48-546e-4445-8433-6ebe06806dae.filesusr.com/ugd/5b1e3c_162247f5c8bb4fb390bf7e910d597230.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/
    • https://a869dd48-546e-4445-8433-6ebe06806dae.filesusr.com/ugd/5b1e3c_162247f5c8bb4fb390bf7e910d597230.pdf?ind

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006504.bin
1a6760d875d7caf12487bf1c8ac783e6953becd765e1b3d3098ad343a57d5eef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 5236 bytes
font_01_sfnt_off000076ac.bin
0d9fb56c21ee50c8e33b2ce6d2e8bc69be90e044342912fd26040168afbc37fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AC 10104 bytes