Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc96d853bd955c2e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 00:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4145c879ef264c0927a154a2bb7e07ba SHA-1: aba4628a555b3cedb076d23117bffc7682ffcf54 SHA-256: cc96d853bd955c2e695b54c4d1244f73ade3882ad396a05b179e7efdbee5c583
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to malicious infrastructure. One critical heuristic firing indicates a direct link to a known malicious redirector at `https://ttraff.cc/pify?keyword=anexion+de+chiapas+a+mexico+pdf`. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to Shopify domains, likely as part of a SEO poisoning or link farm strategy to distribute malware or phishing 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.cc/pify?keyword=anexion+de+chiapas+a+mexico+pdf
    • http://xituko.cdcheboygan.org/uploads/1/3/2/7/132710779/6032196.pdf
    • http://files.caseforoptimisim.org/uploads/1/3/1/4/131406036/ranerujezaripi.pdf
    • http://files.newbeginningsob.org/uploads/1/3/1/4/131407148/tabakesakoruri.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/gasagabiwidisonumabusefed.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/oblivion_darnified_ui.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/57870771990.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/tikavud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/rajewad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/92438075323.pdf
    • https://cdn.shopify.com/s/files/1/0450/9528/8984/files/katolight_generators_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/gekulerozunekunojotediw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/gavufovobolepusevedime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f6d.bin
30c2a5c52d5c4c9be3e577689fbe334e3f0d5de8e18cf4ca819c54432a24b74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6D 5032 bytes
font_01_sfnt_off00007059.bin
ecaf65dcb8707441c22a7e14ec4c54d92ee1f88db67bcf497f288056a51ddde9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 10356 bytes
font_02_sfnt_off0000937f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x937F 4324 bytes

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