Malicious PDF — malware analysis report

Static analysis result for SHA-256 89323df67a05bde9…

MALICIOUS

PDF

50.2 KB Created: 2020-10-30 06:20:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 86551810f4c0249fdefcc4f5049bb269 SHA-1: 987aed6f924e208cb23469bda6f6fe57af714a3f SHA-256: 89323df67a05bde918e179e2c5b772db6013ed37f8aab84136c7a157bf876496
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the redirector heuristic. This suggests the PDF is designed to drive traffic to malicious infrastructure, likely for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/123?keyword=destiny+2+slug+shotguns+buff In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/8189469.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/ziraritif-vanobokavajuru-muzasopixopuwab-jusosiwiv.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/wikurixobelu/40k_ork_codex_8th.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/ham_pot_pie_noodles.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/lanexusinoxari.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/50819666716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b920ffc-c82b-447d-83fe-be49ce000ecf/70266421319.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xemobomedeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be5c6dc-c486-42a4-b7c5-f08226cc42ee/99114703735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4e7e73-030e-4dfc-8b1d-308adb77aedf/31422314752.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/anaerobic_digestion_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93b7b41-8772-407a-98d5-c096615829e4/mawolupijakofalikafokolam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 3016 bytes
SHA-256: 07efd4b5ce35fe43d562a47bea6ca2be7e52a32f6dbf0d49a2a72276c44a66d1
font_01_sfnt_off000085c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C0 5096 bytes
SHA-256: b6517502adb852edd4a7100fe9aac4c36cf60e903874223ef15e4dad2cecde18
font_02_sfnt_off0000972f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 10692 bytes
SHA-256: abd05f402af1fec22fcc9f2c975954723b50fdf993624d7467fd3d95904a6231

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