Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f25073a46f56f50…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 20:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452762f6126b34fc3cd8bb511c04c9a8 SHA-1: d2bd9e16f1eab508643caa5af15f157d2e6f0ded SHA-256: 4f25073a46f56f50989399b43062c5e4d5abdff0075fe8f64ab7efd5680b2dda
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary redirector URL being `https://ttraff.com/wb?keyword=everyone%20knows%20what%20a%20dragon%20looks%20like%20pdf`. The heuristic `PDF_SEO_LINK_FARM` indicates a mass of external PDF links, suggesting a potential SEO manipulation or content distribution scheme. While many linked Shopify URLs are benign, the presence of the redirector and the sheer volume of links point towards a malicious intent to lure users 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.com/wb?keyword=everyone%20knows%20what%20a%20dragon%20looks%20like%20pdf
    • http://files.missstonerocks.com/uploads/1/3/1/4/131408899/8157512.pdf
    • http://files.emmaushousewinnipeg.ca/uploads/1/3/1/4/131406739/rajix.pdf
    • http://files.msdgloria.com/uploads/1/3/0/7/130775297/fefiwikenugefuw-jufejimolabepo-vezisup-rokazidonuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/bibtex_format_for_technical_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/50103183539.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/57518671773.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/21649898797.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/tejowekelezodesirosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/autofecundacion_en_plantas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/63801555337.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/personality_traits_vocabulary_list.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_off0000628b.bin
9c7886d384d0b9ff6f6bddd5761e7512ee3fd111f595f251b55da379d768644a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 5576 bytes
font_01_sfnt_off000075a2.bin
9fbfd6db42aae429d938e6b4b3095cba7c9cc61b692c64e887f1cd47c027a0fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A2 10120 bytes

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