Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67d345465ec7515…

MALICIOUS

PDF

60.6 KB Created: 2020-10-26 10:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3f1e80d86035055ba6d439a62a8d3e4b SHA-1: 9d43200c7ec6667f7c476a820a159c3310256352 SHA-256: f67d345465ec7515a3393d28f263774e4cd282dc207bf1e08f511ddb7c49a460
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://gettraff.ru/aws?keyword=almanac+realty+investors+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5f93f45672772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f8bd5aa36b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8d310e2314e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f91b6fda9564.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/1/0496/5639/7987/files/24408533226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4837/6737/files/napoleon_total_war_mod_install_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/sitipepiruxoxumisuzodev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5965cb28-2fc0-4758-8666-7f309e98879b/17361002372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd701a30-5bdf-45c2-a8cb-9dd529258d30/94943385103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ea8fa7-f766-41ee-86e8-0840a4609430/12352104530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a928ec7-9bf2-4b38-8697-6516c4171692/15967161074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0380/1510/files/adding_and_subtracting_polynomials_notes_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/figury_paskie_sprawdzian_3_gimnazjum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/android_proguard_disable_obfuscation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6108/4828/files/ph_calculations_worksheet_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3b414b-422f-467a-9a29-88083bd149f3/76413541172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc312f1-3ffd-4cb0-807a-9cf2d9dc2fb3/25110194879.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/regevizin.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gisop.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/66549564379.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/e_waste_management_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/vidolufaruw.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_off0000a9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A8 5452 bytes
SHA-256: d603b24a855688fe26ec85d5c22d0b4f8b51ec91536fc6bba72409ed058d417b
font_01_sfnt_off0000bc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1F 11964 bytes
SHA-256: ba837e85f6f60546ba2dd413f8bed40485383da8827ba2e8cd8f1f35d196a6d9