Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e4933d17c8d07b…

MALICIOUS

PDF

41.6 KB Created: 2020-09-10 05:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dabaf4f30d1dacde7e5e759c5930b9c SHA-1: c84f1ceadd408eff2b82431dda0bab51d5dee128 SHA-256: 48e4933d17c8d07be8eb30fbebe638eca57ac93ce9454aaad401d1daa430e733
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is likely a link farm designed to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the presence of numerous links and the ML classifier's high confidence suggest a malicious intent to lure users to external sites.

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.me/wix?keyword=articles+with+geographical+names+rules+pdf
    • http://files.sunsolutionsolar.com/uploads/1/3/1/4/131438260/683057.pdf
    • http://fifino.drvegetableinc.com/uploads/1/3/2/3/132302868/85ad8af17809.pdf
    • http://files.giltnerlogistics.com/uploads/1/3/1/8/131871499/3295696.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/81840537973.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/online_access_form_philhealth.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/kepapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/plant_systematics_a_phylogenetic_approach_third_edition.pdf
    • https://static.usrfiles.com/ugd/a771bd_94b38ee460b6436490304825a9639d65.pdf
    • https://cdn.shopify.com/s/files/1/0454/8014/9144/files/66172407649.pdf
    • https://cdn.shopify.com/s/files/1/0439/0587/6123/files/internet_radio_software_free.pdf
    • https://www.cancer.gov/coronavirus
    • 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_off00006421.bin
ca0b6ba368413dad8fdde561336bbb873090e748b117ff03197efcd0db9b895e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6421 5652 bytes
font_01_sfnt_off00007740.bin
6c1139594a6337a1b4dda4d0378ae7235c5fbdf4eb28b025995dad68d5e11f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 10120 bytes

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