Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8449189b4979ff5…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 17:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 744d950f02b6cbf7c12624cc4b533b5e SHA-1: e2fadaa774043b95230405b33a71fc1fdb057388 SHA-256: f8449189b4979ff5fda5c5707a79e0f3aa26b3c674192e980b6f6eafe8c3e403
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm SEO tactic to obscure the final malicious destination. The document body itself is heavily obfuscated and contains the malicious URL, indicating the primary intent is to redirect the user to potentially harmful content.

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.ru/pify?keyword=logic+analyzer+software
    • http://files.ifbiblechapel.org/uploads/1/3/1/3/131383934/3797409.pdf
    • http://files.firstlookliteraryladies.com/uploads/1/3/2/6/132682833/komuxebir_romomomome_minanataperu_jejoximaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1873/files/weather_report_in_chislehurst.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/cancer_statistics_in_kenya_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/1002976259.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/lilekepesojokiladipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7101/files/50277973766.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.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_off000066de.bin
890fc8607b0c75b69231dbf8df2d47e6fa43eb4b415878f6fdc1e131ffb8606c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DE 5236 bytes
font_01_sfnt_off000078e3.bin
c0334fe477b710e8036f9d4b3d40a94df6586d9850c43902848350ce568ce75f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E3 10308 bytes

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