Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d0234c55b373c5…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 01:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb9192fc86bc1018607969a2e1333760 SHA-1: 70c128b2e400543b2226b582d0742999f6ad9287 SHA-256: 73d0234c55b373c5ee040a0ba0df88bb755dc38591816433d4c9a8ddaf1c8c02
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body also contains this URL, suggesting an attempt to trick the user into visiting it. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, many of which are on Shopify domains. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=novel+ceros+dan+batozar+pdf+gratis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/16887412861.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/black_knight_fortress_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/9888006537.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/japikelikisifipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/xogetezaruwixexoza.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/accounting_audit_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0446/6094/9155/files/andante_andante_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0463/6092/0219/files/arthromax_vedajie_inky.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9509/files/nolanafololoserudigip.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/xejozazatutupanowumuv.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_off00005435.bin
eee130b183b774ce2560a2b9c734546dab812b41fd03dcc9a7bc1eb9dfac8b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5435 5544 bytes
font_01_sfnt_off0000672e.bin
658a3ecc7b156d41f612a2e7b4d78e2d56097baabd45a3d3272d8da01c5f5e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 10632 bytes
font_02_sfnt_off00008ab5.bin
c9b9d40238817e9fd1c0b290bb100284b8f2d9dcc1188338581b9d27efa8fa30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB5 16392 bytes

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