Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b0c4fd93d01dc1…

MALICIOUS

PDF

43.0 KB Created: 2020-07-25 23:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e9826408a7f997879dc90ee79a5275 SHA-1: f31387f61adbdabb3b87111b75b3a7ba1b24d972 SHA-256: 47b0c4fd93d01dc109a5f751d1e14e9755730832b94016915cb4dd9f1d344dc3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to educational worksheets, likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.cc/pify?keyword=estimating+sums+and+differences+worksheets+grade+4
    • http://files.constitutionalcritique.com/uploads/1/3/2/6/132696483/murulu_xunetiludovi_bukawifakik.pdf
    • http://files.just-us-justice.com/uploads/1/3/0/7/130739498/458474.pdf
    • http://files.ccamchurch.org/uploads/1/3/1/4/131410479/tilisedeben.pdf
    • http://files.constitutionalcritique.com/uploads/1/3/2/6/132696483/murulu_xunetiludovi_bukawifakik
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/wuzekepogekomofagotala.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/tiradafofuwerupefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3052/files/vobosadoxuwaxitub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/kofuretuzunivemalibelo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9554/6273/files/93530408108.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/56474286275.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/60107839679.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/jiselu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/55523636811.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.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_off00006a20.bin
6c590e1455eb9ad9ddbe5d5758925e24a807f8ac5636b139551038525687e9fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A20 5484 bytes
font_01_sfnt_off00007cad.bin
95d1e55b220510c1a2f0bea5e6604b57b7d6080cae93a19288ae34829a8968e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 9724 bytes

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