Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d54c9343cf5da57…

MALICIOUS

PDF

54.4 KB Created: 2020-10-28 08:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6fff4e98bb3180fd49d69936a5809fcb SHA-1: 8d51b522f76d1ed683b49056bee671a18816ea31 SHA-256: 3d54c9343cf5da573b4b907e3cc79db2afac75e13e53a9f5a7927c41bec4c505
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.me/123?keyword=ashrae+fundamentals+handbook+pdf+download In PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/tanejagife-zogozobogix-dazedareraxugem.pdfIn PDF document text
    • https://xedexebil.weebly.com/uploads/1/3/4/2/134235570/gafefiret-zesenokes-sefozi.pdfIn PDF document text
    • https://wojawafelufofux.weebly.com/uploads/1/3/0/8/130813934/2128366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5f91dcd6786c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f9767923f9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f8cab1de1bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8951b591a1a.pdfIn PDF document text
    • http://d.consid.vn/1kBjzF8NpRXnrp7ZuptBYHZLowXKE0VZrIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007a1a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007a1a.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000b119.bin)
    • https://cdn.shopify.com/s/files/1/0501/0699/0759/files/mot_testers_manual_and_special_notices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3794/7581/files/76996885950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0497/2186/files/independencia_de_mexico_para_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7995/6148/files/formal_syntax_and_semantics_of_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef0ea04-cfbb-43c9-9df0-6f70e9e95af8/xikagerekatup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080f5137-3bde-48d6-8934-f60e07e573b7/conditional_rewriting_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/setojubazilukizativuzig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1246/7106/files/glencoe_geometry_1-5_practice_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/87225682544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/code.org_unit_3_lesson_5_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3258/3578/files/duke_nukem_ps1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6282/8449/files/1705526853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1802/6917/files/bethena_scott_joplin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8560/4017/files/25781161104.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 extracted file (font_00_sfnt_off00007a1a.bin)
    • http://scripts.sil.orgIn extracted file (font_03_sfnt_off0000bf18.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 5400 bytes
SHA-256: b1d64ca417288b7438692b879fe4d60cd5962d01d7e7ad9b1d250c6e240555b4
font_01_sfnt_off00008c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 11108 bytes
SHA-256: 1bbe53dc33d4a59e66c87cba00224a6609487ce4c2c5336bc7beb7c2eaa0dbe2
font_02_sfnt_off0000b119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB119 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_03_sfnt_off0000bf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF18 3856 bytes
SHA-256: 8267f568311234388463740e8544e379268050be3f337cebcb068695723436bb