Malicious PDF — malware analysis report

Static analysis result for SHA-256 434533fe202976cf…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 00:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ad95cb990f2eee437fc5446cc7438a5 SHA-1: 645305b35e2237a377a3982358a66a061a6b7fd2 SHA-256: 434533fe202976cf6029fa76ac84e766110ef7aabbfd7e72771e8b12eed56384
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 link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=learning+numbers+in+english+worksheets+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to educational worksheets, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

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=learning+numbers+in+english+worksheets+pdf
    • http://files.laurierwoods.com/uploads/1/3/0/7/130739173/birusawof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/mibajobisosajaselovuwaxik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/63949546408.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/journalist_news_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/penotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/advantages_of_learning_objectives.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/xudapel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6790/8004/files/alphabet_lettering_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/1944935233.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_off00006622.bin
5279b01134fc1c8c229c55e6e466d01c88a24b8170fb8cd82a89a79fab4a67c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6622 5692 bytes
font_01_sfnt_off00007962.bin
adb7900cc660dbc556986c2cbb5160a91a3cb0c575517310b4f8709afbbbe030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10044 bytes

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