Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4ca62e4fbbc396…

MALICIOUS

PDF

43.2 KB Created: 2020-10-15 06:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b8ab7b191f3c3ec336d10e8af1910443 SHA-1: e53c3fba7d5f205febc88e4226ecc641a4ec69ea SHA-256: aa4ca62e4fbbc39690d39f4599b80a5cdb78c968ba81997b68eceea69f6ea28a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=ibis+paint+x+tutorial+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f87673ea6a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f870b11ba688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f9a251820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8721e87fc47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f86f8c46aff0.pdfIn PDF document text
    • https://site-1043037.mozfiles.com/files/1043037/vifelafolobadizi.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/zuwivu.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/gaporiwasew.pdfIn PDF document text
    • https://site-1038749.mozfiles.com/files/1038749/32398208074.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/begilunos.pdfIn PDF document text
    • https://site-1043770.mozfiles.com/files/1043770/50267269959.pdfIn PDF document text
    • https://site-1039426.mozfiles.com/files/1039426/1828001347.pdfIn PDF document text
    • https://site-1039649.mozfiles.com/files/1039649/gafudufafujoxuvudanitek.pdfIn PDF document text
    • https://site-1041169.mozfiles.com/files/1041169/midatalipuxifuxezoko.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/1/0483/6714/1017/files/short_motorcycle_trips_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9117/0725/files/b450i_aorus_pro_wifi_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8282/5376/files/jegakinuxijedasojesalodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3875/4974/files/365_times_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6121/4877/files/loss_of_hope_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8572/3816/files/lesson_7-4_division_properties_of_exponents_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/40614048784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f00f575-9f45-4974-a519-f20a636b7e09/96122058263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfc721f-7f8d-4693-bde5-8453774aedcf/29599792451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b675f6-1e45-47e3-919d-2acb0b2468c1/40730023313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf2693a-0bed-4995-87b4-fbb1f21690f1/likasexavemugozototu.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_off00006ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD7 5180 bytes
SHA-256: ae51c1a8d571138cf55f0dd8ea4a26210798c4bd44b6d456ea6717651e3ee525
font_01_sfnt_off00007c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C78 10192 bytes
SHA-256: 5fb96f613bb3efb15c017e5f7b561f6add79c28b0bd0e2770c96b24d60f23520

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