Malicious PDF — malware analysis report

Static analysis result for SHA-256 876c7cd599eae4e2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-15 00:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6861b837705a990a0189e9b24dce749c SHA-1: 9a3b49b59c7dc502859a1fa1bc906dbfa2021e64 SHA-256: 876c7cd599eae4e216e71935b1a7cac873b0a5481623beaa5506a39db1a8d434
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 primary link, 'https://ttraff.cc/pify?keyword=demonstrative+pronouns+picture+worksheet', is designed to lure users into clicking, likely leading to a malicious download or phishing page. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify, suggesting a link farm or redirection 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/pify?keyword=demonstrative+pronouns+picture+worksheet
    • http://files.seaspalife.com/uploads/1/3/1/6/131637240/8650119.pdf
    • http://darilote.australiasmedium.com/uploads/1/3/1/4/131452922/513479.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/57225734966.pdf
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/nugokukumurejuxoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/sesosapevokifokopimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/84869035877.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/autocad_frame.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/74828798350.pdf
    • https://cdn.shopify.com/s/files/1/0431/5706/1788/files/fidevoxizinonukuxoganek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/72648069192.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/can_you_qss_vi_ult.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_off00005f60.bin
fb754de0318625df08e57ddf89ead7cc78f194b14f380561314c28923b6fce25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 5236 bytes
font_01_sfnt_off00007118.bin
30bb89814deb8eec876f253a502fb31b5d10fab61dddf4b74720fc5ec77d4b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7118 10160 bytes
font_02_sfnt_off000093d6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D6 4324 bytes

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