Malicious PDF — malware analysis report

Static analysis result for SHA-256 62579a8ff0f27f70…

MALICIOUS

PDF

50.8 KB Created: 2020-10-27 10:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: daee8a6728e4a5d5b374b405370f4959 SHA-1: 41f240d1a58a1a63e7b66ff2cab80e3088c77658 SHA-256: 62579a8ff0f27f7030224869bf916db3805606d4de7794e99feff3dbdc6b5c02
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.me/123?keyword=carbon+arc+gouging+setup In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8f148a2408f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f8912d259d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f8ffbcf28e4c.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/d24806.pdfIn PDF document text
    • https://gobisenuginofaz.weebly.com/uploads/1/3/4/4/134490447/wuvexudekafufot-fanasamuvi-sokanosuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000089a7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000089a7.bin)
    • https://uploads.strikinglycdn.com/files/21f406ed-9347-4d35-9c8c-0759bff69edc/89126264960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93326909-3781-482f-b815-5a58447ae0bc/32960054747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6879a74c-1bad-4664-a3d9-621bc72ab642/notodovajutax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4842f2b0-c7ab-4863-8320-ea7e63f72078/zurakorogesadidoxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/anthony_burgess_1985.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/basic_electrical_engineering_book_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tutar.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/edward_snowden_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1e8cb5-24b3-4d76-ae93-8a4ca231266c/6367886512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbfd545-9454-4536-8d7f-c058b23c93c6/how_to_check_battery_cycles_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1251031-07bc-4df2-adc5-c459728b0b8f/nolajikiludewumibasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e593bb6-1dcd-4f9c-b1bb-bf7e893f94d6/download_free_editable_flag_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/aprender_a_falar_russo.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/54772777766.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/introduo_ao_aprendizado_de_mquina.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 extracted file (font_00_sfnt_off000089a7.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 5116 bytes
SHA-256: 5d97507c3fdf66aaa4af6ae03cf49480f50dda1c0f2ac3a2ddd0b3821e065fe5
font_01_sfnt_off00009b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B17 10112 bytes
SHA-256: 2cb2726141dfc162d3710e0682eae1546f29b35e744a9821249c3287b0121505