Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfca90b8c442860…

MALICIOUS

PDF

74.9 KB Created: 2020-08-14 12:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 941b7af9e0d72738b8d55687b4e0401e SHA-1: 9c6a36ed44b3822ff9a74a6571d6f9fa76720601 SHA-256: 1cfca90b8c442860ad5dcbf92ccf06a59770878cd4f54899561afb38925ab5ef
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=formative+assessment+def'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to lure users to a malicious site.

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=formative+assessment+def
    • http://files.realtorblogging101.com/uploads/1/3/2/6/132680908/9176474.pdf
    • http://files.accesscurriculum.com/uploads/1/3/2/8/132815220/fda1ddef.pdf
    • http://xakawi.kasr.ca/uploads/1/3/2/6/132683459/5423984.pdf
    • http://moveduxi.granbsh.com/uploads/1/3/1/4/131453574/22064713809d34e.pdf
    • http://files.katiebarthedoor.org/uploads/1/3/1/0/131070169/2126898.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/77370849364.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6167/files/english_textbook_for_class_10_maharashtra_board.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/83422684021.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/dapejewebit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4285/files/74513269885.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/59415176783.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/62026835559.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/wevewegaputexaviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/wifupaxetozazazegofal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/mevigobuluvomet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/november_2020_calendar_with_holidays.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.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_off0000e925.bin
2a3011f4362b889d5f189d62c45e1ff3a5246a7e1291fc500a94fc0a38e3fcf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 5036 bytes
font_01_sfnt_off0000fa31.bin
cf0fa54fd13f68699900a576029c465869add4249b52ee8e8acc1d07cbdaa91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 10616 bytes

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