Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ff70a09f1d4dd4…

MALICIOUS

PDF

59.0 KB Created: 2020-10-16 10:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 60b000c45d921cf7146bffa3aa72cdbb SHA-1: d42230d40e4d9168cee028cb46390398968d1178 SHA-256: d7ff70a09f1d4dd4bb320db275c2e0ce3439401bec344ebc05eea384411bb0f5
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://gettraff.ru/123?keyword=curriculum+guide+in+mapeh+grade+1 In PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/2592109.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/cf165bd78d.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/772b57b182c6abc.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f88ed1facafb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f883ef08dbc6.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/1/0435/0692/5720/files/73903334174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5801/8472/files/dead_wake_discussion_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7590/2881/files/clash_royale_hack_free_gems_generator_no_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/91744444850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3493/files/swg_pre_cu_armorsmith_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/taylor_swift_album_covers_animal_crossing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/gabemar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8106/7421/files/night_vision_potion_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f650c00b-e6b4-4481-9d60-c0c2c101d0a3/wimuwebodebipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c097c26a-9e2b-41fa-ad57-7fb5fa061cab/pudatozud.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_off0000a927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA927 5264 bytes
SHA-256: 6ba9d741f10b6f6f12fdf5230873249b129d10e80b72ba52a17daa49e40ffd8d
font_01_sfnt_off0000bad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD8 10468 bytes
SHA-256: 8df3fd5ef50d16b1a6e442c74bce354177cdd864429f99512d042118fb08d3f9

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