Malicious PDF — malware analysis report

Static analysis result for SHA-256 7107d0f4f7ee7238…

MALICIOUS

PDF

43.4 KB Created: 2020-10-25 06:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 935213cd07b7fcf9c9d391879c0e4558 SHA-1: 89e81983a65906b47b2b4747bf54f918cd2c9548 SHA-256: 7107d0f4f7ee7238a0974a8c8d13dbc0b4a4707508916732653d1a8305dfe8a4
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/aws?keyword=mapa+mundi+pdf+em+portugues In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f8b186bb1cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f8dd27e6d121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8d223de49da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5f945373c11d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8e3aa168837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f90b137d4da0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f89fb63e0e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f909745297cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f94a42f7f30a.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/zisam.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/fowejedopifelajiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b75.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b75.bin)
    • https://cdn.shopify.com/s/files/1/0482/0061/4040/files/64288989519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/9368188524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9731/2424/files/suwijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/watokaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/descargar_calendario_liga_mx_apertura_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/42742310752.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/tapefemitomube.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 extracted file (font_00_sfnt_off00006b75.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 5336 bytes
SHA-256: 1f9794963e43c44cede14fe9cc2ad83c4d700bd080da2cfc609a51126f266cc3
font_01_sfnt_off00007d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 10244 bytes
SHA-256: c637f227df96f4c9cd9023a75cf752b7cf404b6bb0e53e71696bd0f1d39330bf