Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c5ff2af305d8a1…

MALICIOUS

PDF

47.1 KB Created: 2020-08-12 05:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971969ad71b3586a3ff4f780517d7a25 SHA-1: d56e320dd4368389c1c6cac9d3fdd0d7a3cf7df7 SHA-256: d9c5ff2af305d8a17ae224dae510203bd69c7c8a776bcde824c4ecc33a1be2c8
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it's a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links. The primary malicious IOC is the redirector URL, which is likely used to funnel users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=universal%20islands%20of%20adventure%20map%20pdf
    • http://files.hiemstragardens.com/uploads/1/3/2/6/132683014/01d422df9699.pdf
    • http://kudisev.contractorsinmalibu.com/uploads/1/3/0/7/130775162/kiboxudexuse.pdf
    • http://files.europetothepeople.eu/uploads/1/3/0/9/130969708/xewulaju.pdf
    • http://mikolu.seelenleben.ch/uploads/1/3/1/4/131453540/pudego-wukabawexusog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9333/5970/files/24476871083.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/islam_religion_of_life.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/bsc_maths_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/21054079614.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/69934022518.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/80988494345.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27984898694.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/fuzogiganax.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_off000078b6.bin
e2e9d3f90d16ebd0c6508b21bd6ef444f03e11852b77e975e96d8dcb5f8a348e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 5236 bytes
font_01_sfnt_off00008a75.bin
758912e2b90c584c2df7d23759924bab34478c14fc133300ed67d47d59f90512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A75 10900 bytes

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