Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfd0f3a4899e327…

MALICIOUS

PDF

49.4 KB Created: 2020-10-18 07:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4eed50411bdf26b0602ff27c9c38fbb3 SHA-1: bc394b8946c42acd10125e21ab1396d3bb187a7e SHA-256: fbfd0f3a4899e3270c60e2c617e7632849bf629950d42429267c84f2166219ca
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=free+android+phone+transfer+software In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8b59cdc42fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f877d5e7ce0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f872fb2c6d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8730fc8c5ea.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/1/0440/4579/5493/files/i_have_learned_to_be_content_in_every_circumstance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9343/7850/files/puzzles_and_dragons_mod_apk_17.3.1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7051/3846/files/71088210089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aced479-a25b-4be7-aa61-7ab861ac9f0d/bud_not_buddy_projects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5efd93c-30e1-4fe0-a99d-c88ce7483898/11619689686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a56f167-7ad7-48be-943a-e651060332a0/gefabolisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2787c2-8a8a-45aa-ae41-3a01ab45187a/73433209841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925079e1-29f2-43e6-bd11-8d02f60d9c84/83971922349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56da99a-2c5a-4e63-8187-7e05154a1d54/38209693732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4312/5917/files/6509336545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/rarukokijuxodadurupunubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8197/2888/files/kavarovijimojexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/nikon_d5600_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0950/2116/files/6464170037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1436/3557/files/menupezewibuvareled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/97110684721.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_off000081d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D9 5144 bytes
SHA-256: dcdcbb941351f7bc3b6312eea4e682b582fc06879fcaef7860da012bc3f1c79c
font_01_sfnt_off00009363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9363 10900 bytes
SHA-256: cd2871011a2fbd29cedb4a045637fbd5db06653400d4ad629e366fe25828a384

Open this report in the interactive analyzer, or submit your own file for analysis.