Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11c4986d85b0a4c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 14:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b197b48268d4d9b950a44f45de437b51 SHA-1: 2678a7b8801c2c2c902a41f568697ff4331158be SHA-256: d11c4986d85b0a4c0261ff752d8870d8a7fd0d27d47eff45dd2baaf1d7dca046
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.com/pify?keyword=space+race+timeline+pdf In PDF document text
    • http://files.alabama-lera.com/uploads/1/3/1/6/131607163/jujogixafafixo.pdfIn PDF document text
    • http://files.vancoschool.com/uploads/1/3/1/0/131071289/wukibe-welolutowiji-xemajuganamuv-rebusi.pdfIn PDF document text
    • http://vipiko.classroomtechresources.com/uploads/1/3/0/7/130740141/bd28f39.pdfIn PDF document text
    • http://files.kenyonbuilding.com/uploads/1/3/1/3/131381991/wimopomabawep-papozuxafozadud-jonegivupudig.pdfIn PDF document text
    • http://sofekoko.fbcfnh.com/uploads/1/3/0/8/130874330/2c3ee785d.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/1/0429/3804/0487/files/saude_segurana_e_meio_ambiente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/mivawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/auto_tune_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/pacman_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/27976795574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/ielts_vocabulary_list_for_listening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/70851846884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/gotavalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7207/files/42103063285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5030/1590/files/83973849541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/60821600295.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_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 5228 bytes
SHA-256: 362d85a86088ff7ec3c49cd7fc428be99a3a358ea9e8a8899a6fbae88eb8c5ef
font_01_sfnt_off0000787e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787E 10144 bytes
SHA-256: 0caaa478452d10c475f0542e994f080c27e3a69ca47c2c9dac2cd1be2d550486

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