Malicious PDF — malware analysis report

Static analysis result for SHA-256 610599ec64a75b02…

MALICIOUS

PDF

35.9 KB Created: 2020-08-14 01:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 300410ef18790e050ff6e99bab8d52a7 SHA-1: 46f2c716df003dd919bd638dd22f056a112dbfd6 SHA-256: 610599ec64a75b024e0e96757e79c70f494efac330e3d8842fe69d75e041e7a4
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL disguised as a Dungeons and Dragons character sheet builder. The primary malicious URL, https://ttraff.com/pify?keyword=dungeons+and+dragons+character+sheet+builder, is designed to redirect users to further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious infrastructure, likely as part of a phishing or scam campaign.

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=dungeons+and+dragons+character+sheet+builder
    • http://files.hollandrunningclub.org/uploads/1/3/0/7/130775751/4313741.pdf
    • http://files.alysonward.com/uploads/1/3/0/8/130813526/nuzuxagamur-bokekomaso-mowidalofuz-xavavujoxefad.pdf
    • http://kavomi.allsystemsgoltd.com/uploads/1/3/1/4/131483337/lanomejix_zusuxupope_mobejizum_gutuxanapisebug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/76252783952.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/34001021823.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/33782944832.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3675/files/exercices_atomistiques.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/tobasubus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/sareba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/kalarigamakelewabed.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/free_certificate_templates_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0436/3537/6281/files/81401151151.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dd1.bin
42c7887e3145f7bd35c72e514abb372a50df6a9afd5597e090a7ec8eb67b3c9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD1 5340 bytes
font_01_sfnt_off00005ff3.bin
63d1745dd5cfdc1acdefa2893af8387c0ae30ba8e04c39aa7268dc05ffc78cce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 10232 bytes