Malicious PDF — malware analysis report

Static analysis result for SHA-256 e459930ad8f3c21d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-21 04:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9edead9a5be3fd792d1e101e066d9d00 SHA-1: 3035175810d7a13fe09c0a8aaad9eaa9d7b663fd SHA-256: e459930ad8f3c21da17bc5ff59bb562ed8472cc53d35c54930a8f9f36e75ab44
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the text 'Conversion between units worksheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links hosted on Shopify domains indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

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/pify?keyword=conversion+between+units+worksheet
    • http://files.littleduckydaycare.com/uploads/1/3/1/1/131163747/pujodaru-jururanosu-vasefumezexili.pdf
    • http://gidepuru.thewatercolorbouquet.com/uploads/1/3/2/7/132740405/8528044b.pdf
    • http://files.mypureskn.com/uploads/1/3/2/3/132302780/levenadetovidif.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/67673109167.pdf
    • https://cdn.shopify.com/s/files/1/0435/1852/5599/files/beach_buggy_racing_2_now.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/ayesha_jalal_the_struggle_for_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5754/files/bakery_branding_mockup_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/promissory_note_in_telugu_format_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9256/6435/files/67738077065.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/tugugojugotejupufinumomim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/69564898855.pdf
    • https://cdn.shopify.com/s/files/1/0437/8814/0696/files/30981158567.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/48318039889.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_off00006bf8.bin
81895fbde8ed2d79e4fafbe31e2cd52664c60d4c5a1e096a9b5059a35d613315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 4792 bytes
font_01_sfnt_off00007c56.bin
8df4d0d364f2a52b5180dea3f94ef7d3036693feb2ff0d9fca13b539bc6e9bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C56 10420 bytes

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