Malicious PDF — malware analysis report

Static analysis result for SHA-256 490538a7b45f0b48…

MALICIOUS

PDF

45.3 KB Created: 2020-10-31 12:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 27135e1e5e4053876004e62d5e179438 SHA-1: d8bb4f8d5f8e084089e2abcd96e8a11c0396e043 SHA-256: 490538a7b45f0b48dd3ed123a9cb268d61655f39034e724f93a5518b861615c8
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/123?keyword=future+foundation+spider+man+lego+marvel In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5f8b2fda0fc42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f8e99a20aef3.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/1/0433/9426/9333/files/call_me_a_legend_beauties_outfits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5577/0517/files/selopapif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5768/7959/files/nusakuragalidogupaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8742/8291/files/crime_scene_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c381918b-54fb-4353-9ecb-992f543c4274/nosewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9779/8814/files/game_winning_eleven_2020_android_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3937/3501/files/luxewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/tamil_guide_for_class_10_cbse.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_off00007180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 5376 bytes
SHA-256: 2e1db3f3f546ea041eda58aec78bfa9a8aa4fb55aa6ca2fee809f1b9d0fd1693
font_01_sfnt_off000083c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C2 10792 bytes
SHA-256: 24ccb695e6743da0d2d19f8360d2a25ce39b630db4c83b2839d13f77d0a9613e