Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c06b4c6aed219b4…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 22:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6782001047346e06c6b36ec108eb6f9 SHA-1: 4c0e29066623aef85b4e644abeb0c8597dd919a5 SHA-256: 0c06b4c6aed219b47e35a0ebf8700a03360a2a6abda78b66644cfd1350c066f7
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a known malicious redirector, disguised as an 'error 0x97 repair utility'. The document body, though heavily obfuscated, contains references to this lure and numerous other URLs, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

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=error+0x97+repair+utility
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d5415a_1e7b6f1e04034e6898cc70b270221ce7.pdf
    • https://static.usrfiles.com/ugd/b8c837_35bd4818978648018c63073c3b3f41d4.pdf
    • https://static.usrfiles.com/ugd/1f2646_9a91409f0f7f4841984ef4518bd352fc.pdf
    • https://static.usrfiles.com/ugd/1df9ea_acfcae17b1ff4e379b7af9e154ca5184.pdf
    • https://static.usrfiles.com/ugd/b444d4_dbad194ded73413f984cc39b470b32e3.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_c961f9a46f82473aa38ce2958a50bbf7.pdf
    • https://static.usrfiles.com/ugd/65b209_1378edd2832d47a49debbc3c8d9c4819.pdf
    • https://static.usrfiles.com/ugd/b8c837_84bbaa6a675a47808ba7cc0227446871.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb85a69704e54eceb19bf28d159057f5.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/98921702990.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/american_standard_furnace_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4246/3126/files/94195789461.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/insect_glaive_armor_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/dolce_amore_song_your_love_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/awk_tutorial_linux.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/15088040666.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/ketubigapojesovelunederal.pdf
    • https://cdn.shopify.com/s/files/1/0435/7944/1307/files/spreadsheet_app_for_ios_9._3._5.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_off0000629e.bin
0d1bcc6eb6148f850ef285852ca4c7382b7afbd617833839e745b6f907d2bcba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 5140 bytes
font_01_sfnt_off00007437.bin
bb62a3bc949343d940d24f7a478b6c7df445771df1a03ffc52083b6f469592b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7437 9956 bytes

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