Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c36306264b11d97…

MALICIOUS

PDF

51.6 KB Created: 2020-08-04 05:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aea4836ac1912ad606676ae681029ca SHA-1: 05b97b43a62ea0e22ec381eefae5ac845a0de336 SHA-256: 7c36306264b11d973e7b727048479dd561a69c9bca792210e0b5e51415639270
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. This suggests the document is designed to redirect users to malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary malicious indicator is the redirector URL.

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=amu+b+tech+entrance+syllabus+pdf+download
    • http://files.dickbrown.us/uploads/1/3/2/7/132740458/bosivug_zugerovitolo_zavot_lasusonora.pdf
    • http://files.sehasedona.org/uploads/1/3/1/3/131383754/rutapomotafav.pdf
    • http://files.devinbanerjee.com/uploads/1/3/0/7/130739214/1729058.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/22781185483.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/metinivotiliru.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/65822851973.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/gikokogamujililowidokiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/wemuwopolavarison.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/wifajimipifedimegimepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9446/6969/files/take_back_your_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/38654455851.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/zukelukov.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1600/files/gekigot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/jumodavuxisozivoz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa1.bin
9916928837ecc4bd9c79e2e1f7dd7ce7f0e805420cf7546639af3bba1414c227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 5716 bytes
font_01_sfnt_off00007dfb.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 2320 bytes
font_02_sfnt_off0000884d.bin
b2a9ca57ffa4b23026ec7d7fdf8829b96feaefca08d8a78f01801896bbabc8dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884D 10220 bytes
font_03_sfnt_off0000ab3b.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3B 16224 bytes

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