Malicious PDF — malware analysis report

Static analysis result for SHA-256 79469d8476e25b7a…

MALICIOUS

PDF

57.8 KB Created: 2020-10-15 02:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b881ba4234d24bf7a37716bc9ffc268 SHA-1: 87e535392a5278cb66648153de20430e34e52d1c SHA-256: 79469d8476e25b7a231e0878d325b22dd3dfbf3d591f7419f1ae44138296e270
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=centrifugal+pumps+design+and+application+lobanoff+pdf In PDF document text
    • https://site-1043458.mozfiles.com/files/1043458/pogetutudirugeko.pdfIn PDF document text
    • https://site-1048162.mozfiles.com/files/1048162/16018126127.pdfIn PDF document text
    • https://site-1043154.mozfiles.com/files/1043154/65444909319.pdfIn PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/jejededajaju.pdfIn PDF document text
    • https://site-1048452.mozfiles.com/files/1048452/92973458583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f87344b7e292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f871fea94e85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8742105ce30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8769ba6e78b.pdfIn PDF document text
    • https://site-1042886.mozfiles.com/files/1042886/muduzijexolovidegolefer.pdfIn PDF document text
    • https://site-1039740.mozfiles.com/files/1039740/41251280738.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/720a08ce-1db1-4a81-8783-823860a21f8d/38294077312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d9d81f-bc24-45a1-9722-603d90751560/56371290180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44db7d36-422f-4920-a2d5-279825c9a82d/7883652108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa74156-193c-46ce-a6e3-56150150c4e6/bozuwemifekavifinitufawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c227ca2a-d064-47f3-8dc5-1392d411895e/redama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ed47cb-2cca-407c-acc9-63a7eecf1461/26587165217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4803242-743e-461e-b408-c501014e7365/82212910043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d051d695-3ead-42c1-83c8-78e9f45d7d26/52462377624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/wavetatitinigapova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/teostra_guide_reddit.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_off0000a158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA158 5520 bytes
SHA-256: a5583860965b060f878b8f1cd67d258183013be7cfabb6c1e0e3f1580ea4d13f
font_01_sfnt_off0000b3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F8 11284 bytes
SHA-256: 56e8a760dddfab8df06f390c17437621bbdb48599702670c5d5159c9c8e954d9

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