Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ecde8a2954ac2f…

MALICIOUS

PDF

68.7 KB Created: 2020-10-19 09:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4ce12a4fe5c85ba89c9e90db7b8d8406 SHA-1: e188a7940c8e57ce249b1d3f62e8981d64c9ed4f SHA-256: 35ecde8a2954ac2f3d6f54b74561c9d03e41f05a3e8560596cf4d4c578b13011
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.link/123?keyword=desh+bhakti+song+mp3+download+wapking In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f89f8318101d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f892e5fa55c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f899f8ba1cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f87c8c1483e3.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/6383994.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/nazafa-pidikexazug-kavolodiwo-jogesikuwuner.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/1/0266/8783/2256/files/nizeruxukilow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0436/1366/files/1804_silver_dollar_fake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8526/1717/files/26395908971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7096/2843/files/selfie_filter_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3032/1568/files/lolixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583a4035-f63c-472e-bbf1-e7214c0e9c2d/javaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad3867f-1208-4796-9a4e-c7e96da95a65/81298673399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053bc727-dc96-41a0-b589-598f37d24953/pokemon_sun_and_moon_download_apk_ro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9234704a-eb95-41fb-9f43-873dbb9db1f5/falta_de_densidade_osea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9399/3893/files/author_allison_brennan_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0928/1695/files/6099347832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/rca_universal_remote_manual_rcr414bhe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/emoji_font_for_flipfont_3_apkpure.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_off0000c944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC944 5736 bytes
SHA-256: e70406db8a0d33101cbdebedfe4a93de9963d29f71847fb209ad731555d5fd76
font_01_sfnt_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 12724 bytes
SHA-256: b54750739caa071cd76c1f18baa44628954bccfc5d731811fe935c3b9c971313

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