Malicious PDF — malware analysis report

Static analysis result for SHA-256 98009a4f9941ef9d…

MALICIOUS

PDF

41.9 KB Created: 2020-11-03 19:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: b954dbb16dc3de49dda145913f1b045c SHA-1: 6a20b7fe2aab8139adb2d784ff47ed2f05f6be93 SHA-256: 98009a4f9941ef9db0d1a7d2128945d685609dc7dc46cb819591e28e17454438
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=pitbull+puppies+for+sale+in+california+2020 In PDF document text
    • https://zijisejimalunu.weebly.com/uploads/1/3/4/4/134495917/metuvaxul.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/2752108.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8d9b5ca0341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f909f00bcc30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widofafane/64368513809.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/vimejojetevimogom.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/america_the_story_of_us_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/cm_to_inches_conversion_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476375fc-cd33-41d1-bde5-8a9edbb91c48/55733919408.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/dizubetifogojulowunaw.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_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 5424 bytes
SHA-256: 91fd5db6a433f8eee41554498b3fcd07f1705a5324f9f4c709e393fdf5ca790c
font_01_sfnt_off000074c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 11328 bytes
SHA-256: a488ee8ad2113ef77966b774aed39ec6b11e6af5f224d3bf6f64f53aac828b34