Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec23e3a1bffeb56c…

MALICIOUS

PDF

43.7 KB Created: 2020-10-30 01:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 46e210c2cdf8ecacff0e8570716be2da SHA-1: 54332d2a2e6ea36b6d70d458ae25747516cf87cc SHA-256: ec23e3a1bffeb56c00f49bd433ae046c850f75efef7ea426bd058125f3233d5d
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.link/123?keyword=one+of+us+is+lying+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f9b47fc32eb5.pdfIn PDF document text
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/gikujobuzum.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c01.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c01.bin)
    • https://cdn.shopify.com/s/files/1/0502/9920/7863/files/sometimes_i_lie_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/xakibavenoravebival.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/21244462285.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/apc_computer_applications_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/mifix.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/43210988975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3138/6041/files/27484483401.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/aaen_clutch_tuning_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/26308470298.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_off00006c01.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C01 5032 bytes
SHA-256: 95502ba400a8821b4e6c45f8d5fbf6f9eba90507adfa6583b2dced0ebde90e14
font_01_sfnt_off00007d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D47 10892 bytes
SHA-256: 4a0adbe90da34449cb11bb4b3939c880590978dbde6ca193e6bd20b801d6a0d9