Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc33d6066fca4d5a…

MALICIOUS

PDF

43.5 KB Created: 2020-09-06 22:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb8d69842edf21698d1ac612258c5f62 SHA-1: 0c1fbcb5731bc3e44af1e266085f352e9336d719 SHA-256: fc33d6066fca4d5aadce0095eadb5412bfad792098b82c55e1b08a82b3215f6a
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to appear as educational material, but it redirects to a known malicious domain. The primary malicious URL identified is https://ttraff.cc/wix?keyword=addition+practice+worksheets+for+kindergarten. The document's structure and embedded links suggest a social engineering tactic to drive traffic to a malicious site, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=addition+practice+worksheets+for+kindergarten
    • https://cdn.shopify.com/s/files/1/0437/5429/1361/files/63917386562.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/idodo_umeh_college_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/9537689025.pdf
    • https://cdn.shopify.com/s/files/1/0440/9566/8376/files/risk_management_finance.pdf
    • https://static.usrfiles.com/ugd/837d34_c5a8f394f5784ebd971aa98fbae10b69.pdf
    • https://static.usrfiles.com/ugd/57c819_1fe401a759f543358cafab6659e35381.pdf
    • https://static.usrfiles.com/ugd/b8c837_623c16f8a7a44d1eaae6d3bf95a21b91.pdf
    • https://static.usrfiles.com/ugd/ecd213_94c3bc3e19af4bd5b14931e0f535e268.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7deda28ff6422481ffdd6e65b38894.pdf
    • https://cdn.shopify.com/s/files/1/0436/2511/9904/files/vipabifajaberuxiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/root_checker_pro_cracked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/80555836696.pdf
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/30057505690.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/8739158924.pdf
    • https://static.usrfiles.com/ugd/b73feb_f71170b5b6984fe2956d5e69e098b57e.pdf
    • https://static.usrfiles.com/ugd/c1108c_c31610adbd8243a19f278177a6b0a6c4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b45.bin
f4c939a31ee61d1a792a8d1500efaaf1d14cf717fc3566809478d945360d758e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B45 5528 bytes
font_01_sfnt_off00007e26.bin
72b250abcfa86031d0cae473b00089cb25ea3d7e39765b72682f7c88b2875752
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E26 10136 bytes