Malicious PDF — malware analysis report

Static analysis result for SHA-256 3509ece502f2794c…

MALICIOUS

PDF

69.8 KB Created: 2020-08-14 13:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6ebea94f805ffcd0fa7d574afbbc05d4 SHA-1: 6384450a512658acfc6c504bd47798bd8fcf3f7f SHA-256: 3509ece502f2794ccdd642cb88aab0da00e8bf72f252a55252e98a9cd03c245d
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.ru/pify?keyword=android+camera2+api+tutorial In PDF document text
    • http://files.visionlogic.org/uploads/1/3/1/4/131453276/55b53.pdfIn PDF document text
    • http://vezizotej.djfndctn.net/uploads/1/3/1/6/131606636/2784566.pdfIn PDF document text
    • http://files.ourharvestmoonhomestead.com/uploads/1/3/1/8/131857308/dugixipisogudes.pdfIn PDF document text
    • http://files.darlabroadwater.com/uploads/1/3/1/3/131383514/jamoximigorib.pdfIn PDF document text
    • http://files.printfinishingstore.com/uploads/1/3/1/8/131857115/lenumepuloxis.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/1/0432/3275/5875/files/step_3_qbank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/gisuzulun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/puxagomekoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/tugifitaligigevabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/dari_file_ke_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/39410533142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/organic_farming_wrt_cosmic_energy.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_off0000c2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AC 5164 bytes
SHA-256: e6621b85287249f02dd9788ca610365f3be483c13dd3f6f8ff0277ee5b68fb14
font_01_sfnt_off0000d418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD418 17456 bytes
SHA-256: ac0a4a5927fa25ca1950d5aaa0715c7d6e9095de451b7982855a21d0f2b0e97c