Malicious PDF — malware analysis report

Static analysis result for SHA-256 4778a9d9a64ae539…

MALICIOUS

PDF

45.6 KB Created: 2020-10-27 07:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 60a162da762582a9fc19350e86135839 SHA-1: 9ce80c1feb99f4504b259ab8deea93b86660c593 SHA-256: 4778a9d9a64ae5392b0fea8926f6bf7c9a1153590a9724b298f31af70a523598
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=yellowfin+tuna+prices+per+pound In PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/7416743.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/woxuxugosewukodel.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/5686684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5f96233ac556d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8de88b18e3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f873159126fd.pdfIn PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/d72a2.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/284df.pdfIn PDF document text
    • https://tewubituzidebu.weebly.com/uploads/1/3/4/3/134359488/b844269.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000072db.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000072db.bin)
    • https://uploads.strikinglycdn.com/files/bcf4c133-9023-433a-88bc-c23b044447a7/55803221434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01d473c-0404-4032-9a16-0227eb8efb17/tally_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/salat_istikhara_mariage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0054/4418/files/passive_and_active_immunity_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8997/2385/files/mafumetulepikevovof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9150/0449/files/56416959281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/dosafofirukulumof.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/banting_meal_plan_week_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/69701151288.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/65317627974.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/etabs_api_documentation.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_off000072db.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DB 5200 bytes
SHA-256: b86c5591e17b672327161e49611e7f592735d7af88d70d45ce64c7e07e4e0554
font_01_sfnt_off000084aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 10568 bytes
SHA-256: cb1bd8e899ff401bae21f5bc1ea564442df285519024022c2d0a604ade394bf6