Malicious PDF — malware analysis report

Static analysis result for SHA-256 734ed713fc9eea73…

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 08:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c43e0df8f30c7e3b9481a589923bf5 SHA-1: 9b4c386590ecf54c1aac97577d66157083bf1152 SHA-256: 734ed713fc9eea738cba8e561e887199aba4f9d90cdf622bb8df0b0b5d435d66
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=nec+nta+3110+manual', suggesting a lure to a malicious site. The presence of many PDF links further indicates a link farm or redirection strategy, likely intended to lead the user to a malicious payload or phishing page.

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=nec+nta+3110+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_054f7823701d4e72b3a7a00e0b0ad30f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7649132ef5904122b1299c1e52f472a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b94b05d034940d8877c2d6facf28444.pdf
    • https://static.usrfiles.com/ugd/b8c837_06e8a627ee03465bbc94196d98c9287b.pdf
    • https://static.usrfiles.com/ugd/b8c837_847600236a9d42ee85982da61d0b7367.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4dda66298124c45b7c90b0a0761bc49.pdf
    • https://static.usrfiles.com/ugd/0c41e7_0996e46b256d4744b3c6ea184188c1d3.pdf
    • https://static.usrfiles.com/ugd/10a4aa_2efc13062cae46cf864ccfc77bff096e.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_52db215b6b4a41e7871c11d82c10b5c3.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_19d9dec11c554300bd624f417d74ac0e.pdf
    • https://static.usrfiles.com/ugd/bf07b1_403fa9049ed64c9092211a9cb742e849.pdf
    • https://static.usrfiles.com/ugd/d55797_dff78e0a9ad44acd8ef45098b11505cf.pdf
    • https://static.usrfiles.com/ugd/d54300_b640ea5ac54a46b2bb6a3bbfbba5e51e.pdf
    • https://static.usrfiles.com/ugd/e4ff69_670267d87a4140b4933daa0c7af40b5d.pdf
    • https://cdn.shopify.com/s/files/1/0440/5372/5334/files/electron_configuration_orbital_diagram_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/76211891146.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063bc.bin
d1265ef94dd2ea4ffadd222ef2b69efa0a0e06ee3e297bc99eb4ee56bdffafa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 4724 bytes
font_01_sfnt_off000073b4.bin
b719ec1c5a2cd54189493aa70064a96812f90613d55fa9de69d225119358807d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B4 12912 bytes
font_02_sfnt_off00009d3d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3D 4324 bytes

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