Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fc689f73b0aaeb…

MALICIOUS

PDF

61.3 KB Created: 2020-08-19 22:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0779bce52e57d45954b510cd702465a2 SHA-1: afcb7bea567dad5e6a9f9028e2ff45ba3c0e1ed8 SHA-256: 77fc689f73b0aaeb9066bf27272bb5b9da071401f5bc143a0a0af436702598a6
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to benign Shopify URLs, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The document body, though heavily obfuscated, contains a reference to the malicious redirector URL, reinforcing the malicious intent. The presence of multiple PDF links and a critical redirector link indicates a likely attempt to lead users to malicious content or phishing pages.

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/pify?keyword=latest+bhojpuri+movie+video+song+2018
    • http://files.pandeliascanaryyellowcompany.com/uploads/1/3/1/4/131452741/vemowififit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/vetevetamanefubekan.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/fundamentals_of_advanced_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/jenis_jenis_alelopati.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0440/files/naxipeniwukigavosesulut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/sodijuwesafigive.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/rovatodufutabelaxigikedux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/95334719423.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/4704251255.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_off00007166.bin
53b1fd373c80341b246e324017ecbc9aa64cd3fc3ac919f315ea0958fb0e899d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7166 6076 bytes
font_01_sfnt_off000085fd.bin
79b5b7d6fb370f6bda8e205dd640b1484cd4ccffc497ef1d06344d417a49fad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 15920 bytes
font_02_sfnt_off0000b692.bin
6879b35068a821fe40f12c379e2b841cfc52fc7587a1eb3ba37dab8156c2a986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB692 16396 bytes
font_03_sfnt_off0000cc83.bin
d3f05814a954990fc7346f1f7a26920a439cbf5982e5fdaefa56522bc8947075		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC83 8292 bytes

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