Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd216b02c11ee04…

MALICIOUS

PDF

50.8 KB Created: 2020-08-11 06:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01beac6d385babff219b3fc12355564e SHA-1: 7579077d3e54004d5cf6ecc365e20e335eac2844 SHA-256: 3bd216b02c11ee04bd5d518f20e944d77077960ac613668dcc5a1d925c45573d
152 Risk Score

Malware Insights

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

The PDF 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 appears to be a lure for 'cdc vaccine information statement pdf'. The presence of a malicious redirector link and the link farm heuristic strongly suggest a phishing or redirection attack. No scripts were extracted from this sample.

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.ru/pify?keyword=cdc+vaccine+information+statement+pdf
    • http://files.changibusinesspark.com/uploads/1/3/2/8/132815866/ed58d.pdf
    • http://files.velveteenmommydesign.com/uploads/1/3/1/1/131164009/vubufuti.pdf
    • http://bisofij.infurnace.com/uploads/1/3/0/7/130775735/d4c4306c813c939.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/dumabi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/47329239668.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/fikagulaponukex.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/68863345049.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/82202497821.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/xabiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2966/files/breast_cancer_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/cch_chuyn_thnh_hnh_nh.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/tau_6th_edition_codex.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/lonuxatazopewekoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/kusatiralonomexixumo.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_off000088a4.bin
2f931f7748c3175b09e084ecd753adf645282fda60d7c4cc1895a1d9fd6b453b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A4 5236 bytes
font_01_sfnt_off00009a61.bin
32ddc44a0345330b0ba5a0fd7cbfd77c025539dd3bc81fda418312a940a43e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A61 10964 bytes

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