Malicious PDF — malware analysis report

Static analysis result for SHA-256 249cf4386f15e7ff…

MALICIOUS

PDF

37.3 KB Created: 2020-09-19 01:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b98db20313468ff92a6eab5aafb1c19a SHA-1: c6ec46b3b0825128766d3cc9bf26d10c6fbe5dc8 SHA-256: 249cf4386f15e7ff573df7f2a5549c5006a40b5c36c9cc902e9efe5d371df42e
150 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, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files hosted on various domains. This suggests a link farm or redirection strategy to distribute malicious content.

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.link/wix?keyword=lj+alleman+teachers
    • http://files.youareborn2be.com/uploads/1/3/2/6/132682663/rafipisuwuberiniveda.pdf
    • http://files.creativeonlineservices.com/uploads/1/3/0/9/130969470/5658583.pdf
    • http://files.zion-cobleskill.org/uploads/1/3/1/6/131636678/22ac99b9b.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/zigugemibakija.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/resinulol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/notepad_for_android_tablet_free.pdf
    • https://32acea54-a820-4a4b-aeb2-92cb317feb21.filesusr.com/ugd/fef373_00f0b9474226411e8931a2cddf27c2e9.pdf?index=true
    • https://fb6d5473-d0d2-4f54-bb5e-556d00d9582a.filesusr.com/ugd/bcb9fd_73712e1c8c5948e8916017aa2c9e3916.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/kinh_ch_i_bi.pdf
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/aune_x1s_driver.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_off0000539e.bin
75ce4f9d59434d3d31771650135b909a27646f3d03cf7e9f89ec4fe332b93931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x539E 5056 bytes
font_01_sfnt_off000064a3.bin
bde0abc768908f6ff291d93831aa323831e917535db14a672975d6300a37d0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 10616 bytes

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