Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dfdbeb50668e93…

MALICIOUS

PDF

47.4 KB Created: 2020-10-28 06:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: ff3edf89352fc5fd94e2cf38d6e8028c SHA-1: 954e8e67f0d541e2f68728b0a9cb0a5621869eae SHA-256: 13dfdbeb50668e932b84111e911ea6e3655e264c548006bc69ac564942a1a2d0
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.me/123?keyword=catcher+in+the+rye+themes+and+examples In PDF document text
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/1770034.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/rigerokugi.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/6aff9c04156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5f98f3d9e08cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8717ae221f2.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/gofiguj/dakajavamasolajoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/arachidonic_acid_pathway.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/43543530323.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/34260974860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9628/1766/files/safari_browser_for_android_2.3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9051/9221/files/96195963096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8929/8076/files/jefosavagubebituno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0104/0024/files/sitapatapurop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5895/files/85238252267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6913/2966/files/nyc_tour_guide_license_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/global_theme_store_miui_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/sampoorna_arogyam_siri_dhanyalu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/cell_structure_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7905/5000/files/39614983223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1951/7334/files/tiguan_manual_vs_dsg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/76563337873.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_off00007b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7D 5388 bytes
SHA-256: 6bad3cc615de9ce53def5e86157a496d1f5ee0208e5713608aa470355cfc805d
font_01_sfnt_off00008da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA8 10112 bytes
SHA-256: f8ae26c54a206e6a78d7ffc0844592a741c05d1958293c05abe0ccc72f9464f3