Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f3335c4d34213f…

MALICIOUS

PDF

45.8 KB Created: 2020-10-21 21:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 2bc8edc6a8adcee4ab3f5bda69858383 SHA-1: cf6b7b73677c96bd5c7e041c1fe690014c4b5aa2 SHA-256: d3f3335c4d34213f28f5be781979045fc60e5e69127ec6c9e9819efb4a3c661c
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/pify?keyword=tomb+raider+2+walkthrough+and+game+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f8a6aa6828d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8d13c739892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f873017c22c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f8f5d276eba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f89c15d83753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8fb79d7770f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f87d7f8a0faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8a150ed96dd.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/wepis_muzok_zigow_wopefotub.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/ruwupiwexisifi-fikaritowunu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/benisan.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/c5ee2a9b-2a30-4a5d-8c85-f2ec6ac2752b/3578515200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b6fcc2-d5a5-4ad5-ba89-1a8a6951c550/golok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27a6008-efb3-4158-8997-da3edca149f0/les_7_assertions_d_audit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a4d3d6-8979-4342-85f3-1ac07f52f976/kuzuwudimijud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee23b5e2-ea98-4ea7-bcf2-f35df266cca4/3309290492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9af55c-18bf-4279-8f11-e3c7ce016a4b/futegel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487f044b-2151-44c2-8b89-5d83371f255f/el_alfabeto_hebreo_y_su_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6a0307-b6ce-4745-bdd0-02d5e2ff5841/letevojefimejirurif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81f90cb-e17c-45fa-ab48-9226df4bc371/74606940333.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_off000070e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 5436 bytes
SHA-256: 703a9987a3158c349d55fb37570b5a192b7bea9d3dd41d0f20a28e0d5920af0d
font_01_sfnt_off00008355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8355 11436 bytes
SHA-256: dc3c357f4f31e30ca61e0c9596d46c119112230f13e02882bb9b57da56dd99f1