Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4a17a5ca520a00…

MALICIOUS

PDF

124.0 KB Created: 2020-08-07 07:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1769ff0bdc6d9f470dce5c3306c78b24 SHA-1: 74759a6418157dab47c4c0374813344e9137bc8b SHA-256: 5c4a17a5ca520a00fd71cdfaf2623cc8b9bc2c0941c6b4cd621e7b3b5a35c8aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains a URL that matches the redirector found in the heuristics. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or redirection scheme designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=vocabulary+in+use+upper+intermediate+pdf
    • http://files.cordwainerproductions.com/uploads/1/3/2/6/132696483/4161080.pdf
    • http://zuzam.roddypaine.co.uk/uploads/1/3/0/8/130874368/5405671.pdf
    • http://tikuf.antiochmissionarybaptist.org/uploads/1/3/1/3/131383791/gezif-posapake.pdf
    • http://files.wearethree.org/uploads/1/3/0/7/130776573/958dc42b4.pdf
    • http://files.playsmart.co/uploads/1/3/1/4/131437418/26e027b341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/82409782474.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/tratamiento_para_cancer_de_pancreas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/returu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/vodejitalojobubobux.pdf
    • https://cdn.shopify.com/s/files/1/0431/3418/9734/files/nipajatavota.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/kekaxikuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/accenture_digital_twin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/zulewefariveke.pdf
    • https://cdn.shopify.com/s/files/1/0437/3345/0903/files/intelligent_data_analysis_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/gaguralinunedevagizogoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/20558634471.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001891a.bin
41e89d07e135c8af365c24734b98f16d26785f9a0cdb5538c227fc80e0d8b946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1891A 5508 bytes
font_01_sfnt_off00019bca.bin
4010495cc9f7b53c7a723956f450fc9dcd7c94e243159d9238d8d1e6b0a06518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BCA 15472 bytes
font_02_sfnt_off0001cccf.bin
d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCCF 16132 bytes

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