Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4eeebba1bf919f…

MALICIOUS

PDF

45.1 KB Created: 2020-10-18 01:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: de094608a927c5a2ffdc2e2f7cbb5aa6 SHA-1: ea91409421ae79a55ac25876e6b568e77fbe7710 SHA-256: 1d4eeebba1bf919f39eb53806cbeb23e5d91cdf8a77c5a5decbff13379902807
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://gettraff.ru/123?keyword=course+hero+apk+cracked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f896f4b17982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f8a7592e5ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f89b477e8513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f87f495dbfdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f894e2576ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f872ed9af5c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8764e56d046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f874d8d353cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f8a57058e1f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f88f5e5bc688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f879f8062d68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbb48bc-9e36-4c07-91a7-7d9085fe12f1/93549828416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccd4292-d7b2-4702-9ba0-9e4b670509f0/28073440768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d344a6-ae3a-4c2b-8c77-1085696ac2aa/33108035160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0266/1536/files/diana_cooper_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3801/8206/files/utah_valley_institute_of_religion_orem_ut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7218/5014/files/pinoy_tv_shows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7435/3850/files/ogame_quick_build_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1802/6917/files/fanuxuwuzuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787782e7-68eb-48f5-87a0-79e577655905/6512178156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ce05ae-88ce-4d9c-996d-f98513c1f175/70450134449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfa4c80-f66d-4cf8-91b5-45ff66afbbad/sevexaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5725e136-5909-4d58-b06d-69ed8485a27a/musudegorogupog.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_off00007242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 5096 bytes
SHA-256: 7b6cf357884715b2de99f8cb8d70d53d6fdaf6d3d4c041f309a51b753a56796a
font_01_sfnt_off00008390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8390 10248 bytes
SHA-256: ea5d0bc28bf36631083ea54a9b9f00cdda196bb9408bf7cfb6f7dd758bef95fe

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