Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17fa61a15bf80b4…

MALICIOUS

PDF

57.5 KB Created: 2020-10-16 02:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 78e39e5c5681a9f0269b6fbebff62f56 SHA-1: 670160f0737ce37725fc92aef8e7b069898e99a4 SHA-256: e17fa61a15bf80b4eb8074ccaef4d8631ee7762c95735a896a7b9d14aff46c1c
102 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to cctraff.ru. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL. This indicates the primary purpose is to redirect the user to a malicious site, likely for phishing or to download further malware.

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.
  • 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://cctraff.ru/pify?keyword=floyd+electronics+fundamentals+8th+pdf In PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/xegusewi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/ruwuxegamatetuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f88bdbd532e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f82da5238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f88cf94d2087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f88bef2273d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87354ad8ffa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d0291b66-eec6-455a-b696-cc4af2457923/kodimawotaguwelatixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80f8c97-5a3c-42b4-9388-0d8888324651/duzesidazefutosawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ca7d48-870a-422a-9b2b-15eb98afbf6d/98202109265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8f4354-ab8f-4fdb-8482-7c6434a36a6f/6081439380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4865/5784/files/50119951730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/nowoxuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4523/8949/files/9659055283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/nebod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/42968127217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7882/1051/files/obduction_villein_number_222.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 5528 bytes
SHA-256: 425984ef0bb9b49b761f06464dcc41af534ea9797ee95c23bca0f5d06e54cfeb
font_01_sfnt_off00008413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8413 14828 bytes
SHA-256: 76a9dc7cae8771608800bfd168f5f040d8596687ed3385448d5ff93a9ccab60d
font_02_sfnt_off0000b2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DA 16448 bytes
SHA-256: 31538a216c0a8bc73fd0eddac8e4f65ebb432dc7a54318c90b09cba63ea139d8
font_03_sfnt_off0000c8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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