Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5a9975baef6883…

MALICIOUS

PDF

49.1 KB Created: 2020-08-24 15:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80623c79844b19fe4a9a8b99baadcaae SHA-1: c6271a63660f5199ec80c1df3aee4a1d7fef2e24 SHA-256: 4c5a9975baef688315e36641d9d33c19454da5bd82d66da5ee468b633493f111
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are part of a link farm designed to improve SEO for malicious content. One prominent link, 'https://ttraff.com/pify?keyword=adobe+reader+pro+xi+free', is identified as a malicious redirector. This suggests the document's primary purpose is to trick users into clicking this link under the guise of a software download, leading them to malicious infrastructure.

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=adobe+reader+pro+xi+free
    • http://gotilo.quackquackcolorado.com/uploads/1/3/0/8/130874118/0e2d5b50cf0473.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/medicare_benefits_policy_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8274/files/calendario_agosto_2020_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/xuvepejagara.pdf
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/lowerebejavofiwojojuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/mubiwaberopuseridapisop.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/69033869428.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/79664977215.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/bearing_size_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1987/9068/files/medaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/possessive_nouns_exercises.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_off00007cd7.bin
a843497efcc7085faecf20633f7a0b578594b1fd458caeb1794fb7fdb928d050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 5020 bytes
font_01_sfnt_off00008dfd.bin
f4d8aeb412e7d71954514840e95ff6c82961acac3123f9ea5be0e4d7d7af140d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFD 13044 bytes

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