Malicious PDF — malware analysis report

Static analysis result for SHA-256 9628e679efe52c3c…

MALICIOUS

PDF

40.6 KB Created: 2020-10-28 04:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e497f49732fd21019c1335e413ad962f SHA-1: 8727d80400b0029e68dc33fc8273483b282bc653 SHA-256: 9628e679efe52c3c6a6311d615125e1441c682530e4a6f3799ce4c7730cd129c
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=minty+pickaxe+fortnite+gamestop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f91dae7649aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8b599b70dc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f8c4ef4a62be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f8e7ba5c576a.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/lilitifaxifasesijex.pdfIn PDF document text
    • https://suretazusidik.weebly.com/uploads/1/3/4/0/134012564/5980294.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/8768291.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005d41.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005d41.bin)
    • https://s3.amazonaws.com/zuxadol/jonudupanutaloninejulema.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/timulowufidurobi.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mixed_modal_verbs_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/mobile_accessories_name_list.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/18194374742.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/innovation_defined.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/quantum_consciousness_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/dilisorilem.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/8573970884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0438bd57-639a-40b1-8515-12f89219e151/44735477069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0cd74e-3644-4f45-a477-f5227e8eb363/runenenomojobelesizutow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229848b5-0666-4a30-a8a7-3dff3f9b4304/61161266826.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/36550656665.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/advanced_english_grammar_class_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/90024307006.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/sekisi.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_off00005d41.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 5540 bytes
SHA-256: 6fc0439d02a0290f4ad1b62d83da906e4a04b9d7887c064c4c05dca7c257366d
font_01_sfnt_off0000701f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 10812 bytes
SHA-256: 6db41e049b7c710b0ec7bc0b93472390f22ca470bf325d1f8508f971393d7a82