Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1400d8aa9f9969…

MALICIOUS

PDF

63.9 KB Created: 2020-08-31 12:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344fb5582dca986fe5c92313cbabe276 SHA-1: 1425dfde8d58cfdd9ff2c067d6175dbfc80d7dc7 SHA-256: 6c1400d8aa9f99699af04c373706c22398038cf38460d3af25de1cd053baa01a
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=underwood+dudley+elementary+number+t', suggesting a lure to a malicious site. The presence of many external PDF links further indicates a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure.

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.ru/wix?keyword=underwood+dudley+elementary+number+t
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/217d68_718a51622fe94bf2b136232cb3ce21f1.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_395058db4e43409498b8e266f5857faf.pdf
    • https://static.usrfiles.com/ugd/8b97dd_af93fc7a40354f419bab6393da0034bc.pdf
    • https://static.usrfiles.com/ugd/c7a620_af93138b22d54084b76a865d2cdf6cc8.pdf
    • https://static.usrfiles.com/ugd/7ff653_0e99881e44514a22b0ac27d93de2ac90.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/jurassic_park_theme_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/safari_for_windows_s.pdf
    • https://cdn.shopify.com/s/files/1/0436/0214/9539/files/wumujobedarog.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/companion_planting_vegetables.pdf
    • https://cdn.shopify.com/s/files/1/0429/3446/8774/files/equations_of_perpendicular_lines_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/wosobote.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/patarakewijuxasokug.pdf
    • https://cdn.shopify.com/s/files/1/0439/9595/5358/files/dungeons_3_cheats.pdf
    • https://static.usrfiles.com/ugd/b8c837_e18be7dba63443988718a581c1cb01d7.pdf
    • https://static.usrfiles.com/ugd/a838c0_28aaa7d9e82646839224e43b18f935e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_79eba934a7234347be9d08136de9d753.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_off00009b8d.bin
f72db8a1cd01ed47574f6e8d6a463b75b75c0101c43beb1446957140a04b9a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8D 5120 bytes
font_01_sfnt_off0000aced.bin
9c1d33bc642e33744b7e30d4bbe89c96c3fcabfc9fd8f1ae36f4c44d2c4a92b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACED 15500 bytes
font_02_sfnt_off0000dd58.bin
458ea428111dad19d58d5c2c6a28c05d2b89d7d6bd941a26f915db0d39c8644f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD58 16088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.