Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3bdfd5c71b9905…

MALICIOUS

PDF

42.1 KB Created: 2020-09-19 13:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8e6a7308fdde1606ff386236d709e071 SHA-1: 60eabedf8cdd186be42d1be194d9fcbab2fb457f SHA-256: 6e3bdfd5c71b9905b2d7539cc216bc7277088aa47f88c87aa1dcee918a0f093b
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=periodic+trends+adi+lab+answers In PDF document text
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdfIn PDF document text
    • http://nelaja.resolvecs.com/uploads/1/3/1/4/131482952/lunovebe.pdfIn PDF document text
    • http://files.suffolkartleague.com/uploads/1/3/1/0/131070604/4981411.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/94138056712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4981/0070/files/lista_de_caracteres_chinos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/bootstrap_tooltip_js.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/camera_raw_8bf_file.pdfIn PDF document text
    • https://4aadfb40-b863-45b7-a3ec-f08bab953a36.filesusr.com/ugd/8bf3fc_6f0b7bdb81e24ac0becb0020d0137532.pdf?index=trueIn PDF document text
    • https://1792e75c-e7bb-489f-a4e4-78e3a7062ab3.filesusr.com/ugd/3801ff_2c46a26469564a4ab3a4d5b5aafd4189.pdf?index=trueIn PDF document text
    • https://f40b95cc-d805-4467-8203-ef2c3c325361.filesusr.com/ugd/1d5a3f_f6861c71f19c4bd88684e4d490998ecd.pdf?index=trueIn PDF document text
    • https://c6c656fd-040d-4c7d-b762-7b31d6ace486.filesusr.com/ugd/f2ef67_3896fc8c87d34633854bf2752d6d2442.pdf?index=trueIn PDF document text
    • https://d072639d-0af5-4e16-94e2-9f1276d999a3.filesusr.com/ugd/a517f4_2a4e1774a6984d1a87e26441fa1e5675.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/61538659177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/generic_employment_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/31627469196.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 5168 bytes
SHA-256: f26a7030683770d3637a8db48cd6e77dbc24fc50b2ecd8a27ae480ce76f7f02a
font_01_sfnt_off000079d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D9 9884 bytes
SHA-256: b50a9114fdb66d3e46a6818a18e352360df9ba3c382ce4b0693de1d16e22482d

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