Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad24d0517943221b…

MALICIOUS

PDF

42.5 KB Created: 2020-08-06 21:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bc1a5180b097af96bd05fe80738d5bb SHA-1: 554e0d435f395f4179cc55c2d552f7322f749e47 SHA-256: ad24d0517943221b8f29676c21560d04b990bb2ff033b2d969c9047048b0bb6b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, with a critical heuristic firing for malicious redirector links. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=anestesia+local+definicion+pdf'. The document body, though heavily obfuscated, contains references to this URL, suggesting an attempt to redirect users to potentially harmful content. The file was generated using wkhtmltopdf, a tool sometimes abused for creating malicious documents.

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.com/pify?keyword=anestesia+local+definicion+pdf
    • http://kodiri.vscl.org/uploads/1/3/0/7/130776088/8314060afe051.pdf
    • http://xebas.westernwc.info/uploads/1/3/1/0/131070109/440542.pdf
    • http://files.ceramicfingerlabyrinths.shop/uploads/1/3/1/3/131379409/05dacd4d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/kewikegotisoxatidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/springfield_model_187_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/bathrooms_to_love.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/autometrica_pdf_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/lopam.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/gold_block_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/27644520872.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/29976588615.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/baldur_s_gate_2_walkthrough.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_off00006951.bin
96cff455f371df7fe25bd7213e3addbf09dc7e4c30471d94ac6b7f5446c42b48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6951 5040 bytes
font_01_sfnt_off00007a8f.bin
7ff4b37f3f9f605e82266328ea0064fbc05a629d5df746fc620a3516845064ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8F 10208 bytes

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