Malicious PDF — malware analysis report

Static analysis result for SHA-256 baddaac0333905c7…

MALICIOUS

PDF

40.0 KB Created: 2020-09-19 07:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3e4c3d95d5611b95a0c11e24f5d0307f SHA-1: 9ccd2ca4f65cdd7a693d1eefaf21497c8c19c91d SHA-256: baddaac0333905c77ae484cf60b87ea312dabf041fdf7e2d2e086761b8e1fda8
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=free+walmart+receipt+template In PDF document text
    • http://files.lyricmgmt.com/uploads/1/3/0/7/130775768/gupezafu-legelazawipopu-dopejoz-datapinuzusik.pdfIn PDF document text
    • http://mapiri.thepaperbackblog.com/uploads/1/3/1/4/131482995/puximone.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/1/0434/1019/4582/files/curso_barras_de_access.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9901/3526/files/agent_vinod_movie_hd_avi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/96907206838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/99058764272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/tosujizakizezim.pdfIn PDF document text
    • https://b71b0b6a-5620-4cd7-8897-9120fd76557d.filesusr.com/ugd/234f58_991acc4138aa4450a60e8facc9e89987.pdf?index=trueIn PDF document text
    • https://73c9d76d-68bc-411f-8258-1433f337bbe7.filesusr.com/ugd/02631b_d28fe322b0d14d019322caba02fba8e3.pdf?index=trueIn PDF document text
    • https://18efb42c-12a1-4df3-9340-8e1fddd9ba6d.filesusr.com/ugd/0a84ca_9a1b62546dae4300bc554e570282714a.pdf?index=trueIn 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_off00006107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6107 4948 bytes
SHA-256: a3da2ca955b22d0cf41a49115ee6bad8b781c8879329ea4575c587f13c62baf4
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 9956 bytes
SHA-256: b57a246ac264bc2f5aad75bdfb52ccc7f79fba47bd8903dd9ef6dab904de845e