Malicious PDF — malware analysis report

Static analysis result for SHA-256 311cdbc588c1706f…

MALICIOUS

PDF

42.7 KB Created: 2020-11-02 12:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 439dd5944b2a789000685e185bb99893 SHA-1: 96f35764e11c7c05eec47691134724ca0c6e4dad SHA-256: 311cdbc588c1706f34bc75c81d015529473127f98d560f20bfa976f4af0f3995
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=naruto+is+a+kenjutsu+master+fanfiction In PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/b393d22fb21ac8.pdfIn PDF document text
    • https://wugaxaxelapuwu.weebly.com/uploads/1/3/4/5/134595152/jimoruna-vajatupob-xifelosupiramav-lokixowofado.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/49e35d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f9b94e43b621.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/2411803.pdfIn PDF document text
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/2671082.pdfIn PDF document text
    • https://relowuforobelo.weebly.com/uploads/1/3/4/5/134528439/9831189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f958c2d698ff.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/1/0501/3992/2625/files/primary_secondary_and_meta-analysis_of_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3915/9958/files/22721489969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7854/0183/files/survey_questions_about_parenting_styles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9903/6058/files/call_of_cthulhu_trove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3068/9984/files/urinary_system_worksheets_for_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625e167f-b9eb-4005-a782-43ee8296d637/1707192264.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_off00006841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6841 5104 bytes
SHA-256: 99d8599a68c329afa421079b09032370407a890e46ea8d20b43050800fca45d2
font_01_sfnt_off00007998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7998 10784 bytes
SHA-256: abd3f4595ed7c4e99a210dbb956621c11b0000b18aceb9c51f63ae104258c817

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