Malicious PDF — malware analysis report

Static analysis result for SHA-256 c344789d6a97420e…

MALICIOUS

PDF

67.8 KB Created: 2020-10-06 00:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e1e3eded304bd2d05e83a0a39785f6bc SHA-1: e52fd7f7196f15f186448d7e9d801967a814588f SHA-256: c344789d6a97420ef4b7bbb3bdf525f2a66c17930bc4d46d85e688e8f917efd4
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/pify?keyword=dbd+survivor+perks+list In PDF document text
    • https://site-1039922.mozfiles.com/files/1039922/24009572556.pdfIn PDF document text
    • https://site-1038916.mozfiles.com/files/1038916/67560314450.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/gumunijezaroj.pdfIn PDF document text
    • https://site-1039253.mozfiles.com/files/1039253/fanoroxopobanodowubej.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/maridupugimeg.pdfIn PDF document text
    • https://site-1042018.mozfiles.com/files/1042018/pelewedufateg.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/61393890823.pdfIn PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/53600765282.pdfIn PDF document text
    • https://site-1039999.mozfiles.com/files/1039999/51197430351.pdfIn PDF document text
    • http://bagofogav.sarahgray.info/uploads/1/3/1/4/131454065/1275074.pdfIn PDF document text
    • http://files.lighttherapyinternational.com/uploads/1/3/1/6/131606331/kekiketopom_nuzip.pdfIn PDF document text
    • http://genofazeg.tcrc563.net/uploads/1/3/0/7/130738526/9141203.pdfIn PDF document text
    • http://dipupit.koasportscoaching.com/uploads/1/3/2/7/132712413/kufubodenefufajefosa.pdfIn PDF document text
    • http://kivonig.youngspirits.com/uploads/1/3/1/0/131070450/zajisoni.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://cdn.shopify.com/s/files/1/0432/4258/6269/files/60958481241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3819/4843/files/using_the_principles_of_design_chapter_12_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5309/2516/files/barney_error_2.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD79 4784 bytes
SHA-256: 4c61749db238286115c8aca7bb92b727d4d818f34638b5906941c266facf877d
font_01_sfnt_off0000cdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD9 11184 bytes
SHA-256: 8a733c3a4ad2c0f0fc9eda765e17f3be3b573d6b2b6cc678ee1c1c810b8fa5f4
font_02_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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