Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea93eda6526da90…

MALICIOUS

PDF

34.1 KB Created: 2020-08-18 20:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a22d23bd19e04c7fdf22fe28d4fa2cd SHA-1: df4c5c74b5ce924f535147af2cbf24c43138c2dd SHA-256: aea93eda6526da90b36b6f5438b0fb48a3b034406286e3c125e6b7b3794bfa93
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body text, though partially corrupted, suggests a lure related to 'Cornell notes template goodnotes'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cornell+notes+template+goodnotes, which likely leads to further malicious content. The file's structure and link farm indicate a phishing or redirection attack.

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=cornell+notes+template+goodnotes
    • http://files.halonades.com/uploads/1/3/1/4/131408209/lumezinixumuxu.pdf
    • http://files.hotgirlluxuries.com/uploads/1/3/1/3/131380915/bf0196666.pdf
    • http://files.uaeeastcoast.com/uploads/1/3/1/6/131637255/6884485.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/foriwubexapozumodijisoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/76443900785.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/peniwarun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/27841879796.pdf
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/jee_main_chemistry_formula_sheet_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5252/9829/files/xiritulibej.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/ligadutofesumokoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5883/files/3059828581.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/76315297927.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/posivurewuzejasag.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/mathematics_grade_7_book.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_off00004a01.bin
ce6e0461b2e3f9081a856573c94dd4c81e3e1b3a2f5d230b7fccac02e86a5831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A01 5184 bytes
font_01_sfnt_off00005b7f.bin
33a0e953e622281a8b46e2051a2912b582945d92242d60a4afa3de09e7160fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7F 9444 bytes

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