Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbed4c0c0179856…

MALICIOUS

PDF

35.9 KB Created: 2020-08-28 03:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7304efdeda27cc3486524365cc56d13e SHA-1: 7bda054749a16942d70c2f1d20ce2d55ce753f56 SHA-256: 4bbed4c0c01798569b22adcf12e1d5e07d4101b59e065cc5199925bda81fbe26
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation or redirecting users to malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=separadores+automaticos+quirurgicos', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify and custom domains, reinforcing the link farm and redirection attack pattern.

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=separadores+automaticos+quirurgicos
    • http://files.bonazah.com/uploads/1/3/1/4/131406735/3629710.pdf
    • http://files.benjamincarkeyreplacement.com/uploads/1/3/0/7/130775032/510d9d.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5637/files/barras_bravas_peru.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/kosoligaraneg.pdf
    • https://cdn.shopify.com/s/files/1/0460/3310/9156/files/allegra_180_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/12355926649.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7808/files/43971499014.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/jikakabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/pesav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/98328826088.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/tobevifuwovinob.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/vuxipuzokivekamalubatewe.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_off00004c4b.bin
56776b211f64e102017d70a205354af374425a69b2f739e3dc82ebcde675a60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4B 5588 bytes
font_01_sfnt_off00005f24.bin
f4d9c5c317584726953f51ec9300967552e6629d21f5e316e5eb7d873bd851b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 10396 bytes

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