Malicious PDF — malware analysis report

Static analysis result for SHA-256 142ff7a7cd5bc1e6…

MALICIOUS

PDF

45.5 KB Created: 2020-09-07 11:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d62ad9a5aa35820cff3225bd64540db9 SHA-1: 357ed68658af8ce04cd3e475e008f88e4e0720c4 SHA-256: 142ff7a7cd5bc1e68c12b0d02d9d63c7d7afc2e2b9311210c752d64800426375
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.club/wix?keyword=cat+island+mississippi+fishing+reports In 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/1/0460/7423/2996/files/udemy_course_er_win._exe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8313/2056/files/gta_5_mod_menu_ps4_usb_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0925/1240/files/beps_action_2_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/mushishi_zoku_shou.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/22692491284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/advertising_agency_proposal_to_client.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/ethnography_research_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/wotanibojexevidafaxodogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/dunchurch_junior_school_ofsted_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/52449858536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/nisirux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1832/8991/files/46263884235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6690/8834/files/smok_nord_pod_manual.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c92885005f1e4e63921941a4326e60d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e9e83_53455d2225e7466085cc1f09650cb64e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/11f207_e21099e7be24456fb09f56814d64c726.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_off000072f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F7 5360 bytes
SHA-256: 06ba88549de7aaec18dc48c080403b8fe7c0549e6b8be05e46159b9b8f31d85f
font_01_sfnt_off00008504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8504 10580 bytes
SHA-256: d927c997583ae9e1c9ddc2fd5f262b92b46bb768ab397cab5739fb9e8f7edb94

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