Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaccfdc687b345f…

MALICIOUS

PDF

39.1 KB Created: 2020-08-25 19:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 499d0669158b67fa007bd75435520f9f SHA-1: 66cfb76bbf73817cb41a8b82335505c9bc1867a4 SHA-256: bdaccfdc687b345fba643e18b2191a3ba770d6bf07d1eea51a78fd9bdef96dea
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, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely intended to manipulate search engine results or redirect users to malicious content. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of intent beyond link distribution.

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=se%25C3%25B1or+eres+fiel+acordes
    • http://files.dioalaministries.org/uploads/1/3/0/7/130776822/taxug.pdf
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.pdf
    • http://jugepuvo.allpurposerental.net/uploads/1/3/0/8/130874218/e41a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/99187708793.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/suwolusalugidepugemafok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/64863062952.pdf
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/advanced_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0458/2673/6291/files/bleach_brave_souls_pc_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/50390361483.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9089/files/dezesoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/bonjour_tristesse_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/venasawuluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/31584317874.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_off00004cdf.bin
67965c7ab93515daeeb7ed7d3769205e20abc6620671f0e69d2159dfe5e8a5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDF 5332 bytes
font_01_sfnt_off00005eb8.bin
7bd0efb56aaf61544071e54df0a69a6aeff9c6fc161a174c7e6ac3e37ccf52d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB8 15492 bytes

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