Malicious PDF — malware analysis report

Static analysis result for SHA-256 baedba4bed2a66ca…

MALICIOUS

PDF

41.6 KB Created: 2020-09-07 01:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b152a7894ef19825594627460f51c414 SHA-1: dd4f342ffb200dcda2041fe8a139b7ae7dad3515 SHA-256: baedba4bed2a66cab8dc35712251f10306991ddd36076e55a7f6b77b6a2232e5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link is designed to lead users to potentially harmful content. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to benign Shopify URLs, but the primary malicious link is the clear indicator of compromise.

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.club/wix?keyword=learning+styles+quiz+for+elementary+students+pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9606/files/autocad_mechanical_2018_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0468/1636/2650/files/business_account_ledger_access_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/59744519381.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/90403942499.pdf
    • https://static.usrfiles.com/ugd/0010c8_b8bb6c73867d4bc1a3ccf3b6c74989eb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/74509306958.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/dictionary_english_to_sindhi_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/lewufuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/ruwiwolupoxud.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_off00006378.bin
bbeb243a8b07a3ae7827467a070ab296b8661673b1c62fc2c720bf9c4d69341a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 5580 bytes
font_01_sfnt_off0000766f.bin
1a011cf3e652e23844fb4e45e2eef88a21b0313365d264bdc8ab3625e1182c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766F 10376 bytes

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