Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa8ccd215c7fd7d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 03:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5c992ae94757876ca3ec6e2998c06135 SHA-1: 5a856d8f21fa96c4d549138f0f071d3afa9651f8 SHA-256: 7fa8ccd215c7fd7d192378eb7efb30f9a1503a698f8caa395d6cad1906b6ed09
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.cc/pify?keyword=does+chiari+malformation+cause+dizziness In PDF document text
    • http://files.elizabethlaude.com/uploads/1/3/1/1/131164399/wixogubudijuj-fuzifewisuwos-zumuxufofefuket.pdfIn PDF document text
    • http://files.spcapitalfundinggroup.com/uploads/1/3/1/4/131482864/sitezetales.pdfIn PDF document text
    • http://files.triadukulele.com/uploads/1/3/0/8/130874254/8152633.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/1/0432/1126/0067/files/79446634059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/jowijiwokizixula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/71598460083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/87391154171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/dazab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/anlage_ek_jobcenter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/website_design_and_development_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/elf_on_the_shelf_printable_coloring_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/87205837115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0622/0712/files/introduction_to_java_programming_9th_edition.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_off000075dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 5312 bytes
SHA-256: 49ac0b037a7b564930be7241826c9e60fe5bc793d9c6c20db34a32491d9435e0
font_01_sfnt_off000087c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C7 10304 bytes
SHA-256: e82edfa5fe01b1950e52c7779ee01eba742d1f5ba9a218671bc56f0899684aba