Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4aa9b66e71b374b…

MALICIOUS

PDF

41.6 KB Created: 2020-10-30 05:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 9b54cab28f7be1ffacaa0edbde3f28c0 SHA-1: e22b949d2ca81bbf795c2886b54581eebd0d442f SHA-256: b4aa9b66e71b374b0280141f54aa7ae4ffd110a5304406ef26d965b4af9536b4
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=by+small+and+simple+things+scripture In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ditupor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f8d1125399f6.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/zezalu_lidoj.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/b72de3.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/cc460.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/509624.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tofizo/ap_grama_sachivalayam_syllabus_2019_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0305/8623/files/74408998656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8bb73cb-ed11-45f9-b836-343a1fa47e57/asamardhuni_jeevitha_yatra_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1630/8896/files/microscopy_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9545/6413/files/taxuf.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_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 5636 bytes
SHA-256: b45ca3b4ec886aeca30e4a46e77f85f88d5243af4e14da1fa452bb254d945138
font_01_sfnt_off000076b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B9 10312 bytes
SHA-256: a1547c7b9bcdd263e201085c5638b0e7275b813f6a216f8d0e67f5528ae4e95e