Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6df95263cdd77c5…

MALICIOUS

PDF

37.1 KB Created: 2020-10-25 21:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6bfcb277777c1898c8653b3a53af8322 SHA-1: 63d044e09bb444c6cb816ac27055b2ecd6d45a7f SHA-256: d6df95263cdd77c58ceaf254a49188c24f197aa8375ce2d87d255e6090abccb3
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://ggtraff.ru/aws?keyword=billie%2527+s+bounce+partitura+pdf In PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/9112494.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/1/0430/5806/9655/files/android_floating_action_button_shadow_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/tibosoteba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/crime_in_spanish_slang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6150/0840/files/74405160305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/misolugixoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/tomipimijajuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9520/5054/files/tennova_turkey_creek_neurology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/munire_convertible_crib_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bc556d-0ae0-4a06-938b-654e4a054d99/36781927585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa171b8-2b3e-448c-87bc-14f9686441d7/a_handlist_of_rhetorical_terms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbff496-b4b6-454a-8382-a7c1ddec1abb/40866209215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a848bc-12f9-4dc7-a7ef-cd2c27125f7b/7615120085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8565366-8258-483a-b178-347e50f79ea2/fossils_tell_of_long_ago_lesson_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab2ba55-5187-4f97-bd4b-55caa25baad6/cool_intros_for_youtube_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9343/7850/files/kulirizojilopubodubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3785/0262/files/microsoft_project_server_2020_administrators_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/netgear_nighthawk_dual_band_ac1900_cable_modem_router_c6900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9599/3754/files/mp3_converter_apk_uptodown.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_off00005404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5404 5372 bytes
SHA-256: 8f499cd1d9c1a00d51fc5469949ce4beec0abf5c7b0d8b3226f2275a2641c9aa
font_01_sfnt_off00006651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 9576 bytes
SHA-256: df0c5abc17249fcac343bf764183c93ef9d304bd117561616d8d15134f46e3be

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