Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6d351190a0e545…

MALICIOUS

PDF

67.9 KB Created: 2020-10-17 07:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dd81d9b177a4ff7a29c5100a1ed6d632 SHA-1: f2e580d504bf7a805b5d015a293622ad21e8c568 SHA-256: cc6d351190a0e545dc50a71c548636497238e422714a2d06847af91774011395
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://gettraff.ru/strik?keyword=the+making+of+a+leader+study+guide+f In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8a416b1dae1.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/6312747.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/6ecb112fe1.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/levobesodex.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/1603386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f88660314f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f8a24f321c7a.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/1/0496/0931/0359/files/koran_kompas_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/84535622399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/fodedasodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63990d4c-99f2-4e84-b665-ffc57d2bd410/bazetexixipubinukex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba8eea3-4f7c-46e9-9665-9d45bf2e161c/41146466188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0182/9305/files/40302836996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/19077347864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5155/6260/files/family_giving_tree_backpack_drive_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4817/3205/files/contour_xg1-a_manual.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_off0000cc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC12 5436 bytes
SHA-256: 967b1a58d798d649af625813c3c64f7761370fd96190aee47b24884f603670cf
font_01_sfnt_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 10536 bytes
SHA-256: d7e404b432aee59c1aa7f3600675c9b1987a75feeeff93170e336a16af155cea

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