Malicious PDF — malware analysis report

Static analysis result for SHA-256 726664516245bda7…

MALICIOUS

PDF

48.0 KB Created: 2020-08-31 04:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be72a3650224608fe0408ba0c3b13ef5 SHA-1: 5ad403357b8ebaf90b5f449a04c4f7c0dff89c20 SHA-256: 726664516245bda70ef75807029abcae18cfc93b26dbbf39a6098469479b94d6
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.cc', identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to a harmful site.

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.cc/wix?keyword=macbeth+act+2+scene+1+study+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/sanaforowusasosisiwiguk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/auriculotherapy_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/catalogo_price_shoes_urbano_otoo_invierno_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/2102/3904/files/avance_par_dent_fz.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_10b3ff46691d413b81769dc206f92c21.pdf
    • https://static.usrfiles.com/ugd/769f78_abbd07aa044341bfa3066bdac3c30772.pdf
    • https://static.usrfiles.com/ugd/b8c837_abd580bfb7c341bf91d6c5d42e205d88.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b2e90230c841c2ac1b7b735ba3c03a.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/vanquishers_sword_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0449/7106/5503/files/ragesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://static.usrfiles.com/ugd/e2c250_46ca571e0489443285d13a4eb1d3d54b.pdf
    • https://static.usrfiles.com/ugd/30e015_6c9ca84aaa0043159f02f00d93df30af.pdf
    • https://static.usrfiles.com/ugd/79e0dc_2023daa820694cf2bbfacf82bfae1197.pdf
    • https://static.usrfiles.com/ugd/a2e20a_4069d104c76d41809ddf52d8a69f662d.pdf
    • https://static.usrfiles.com/ugd/d3758e_223b762c5e1c473c8949f4855fe431ad.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_off00007ded.bin
9da36a572d92df93a6e264bcda8411d88057729fe938687c10d3c51cb035c897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DED 5504 bytes
font_01_sfnt_off000090af.bin
68fe79f8747cdd26ab44ae7b70e4a7294e469229dfb82eb52fae4f874088e00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AF 10072 bytes

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