Malicious PDF — malware analysis report

Static analysis result for SHA-256 280f875348d99d1d…

MALICIOUS

PDF

44.8 KB Created: 2020-08-11 07:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb9afe5e458111eb579436b79a456e0 SHA-1: 0173b552eaadf11f336feb426c786a5f68fdcc0c SHA-256: 280f875348d99d1d8da9d7d19ce4e483d3c920acd70625ce876768560ec80fa9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=special%20education%20teacher%20binder%20pdf', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm strategy.

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/wb?keyword=special%20education%20teacher%20binder%20pdf
    • http://files.danielleportfolio.com/uploads/1/3/1/3/131381231/nifajubu.pdf
    • http://files.laurierobertson.ca/uploads/1/3/1/0/131069899/4039201.pdf
    • http://files.indulge1461.com/uploads/1/3/0/7/130740249/vunaluzugow.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/92925259652.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/bd_laws_gov_bangla_part.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/35473281207.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/witulafanepudurifiradu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/geromibejefanefogurulir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/zozaji.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/vobirok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/72810231364.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/tefokorotuduba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d13.bin
eda3c6cb30ffdeb434c810a1d6e8849097b396c0e8e3b452b2205fd131f19b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 5308 bytes
font_01_sfnt_off00006f05.bin
391d7f5b5b42cabece24568ade1aa79a8a51da90e42f4a9b4f935c38a25fe11a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 10060 bytes
font_02_sfnt_off00009193.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9193 16092 bytes

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