Malicious PDF — malware analysis report

Static analysis result for SHA-256 650f3b1aca07316e…

MALICIOUS

PDF

46.7 KB Created: 2020-10-25 03:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3e8f2f9bb611953931a57b0a3634e832 SHA-1: d3fc57d62b8fab7f161e4884ab589bcf2cc5bde7 SHA-256: 650f3b1aca07316ef8bcf26aabd30fdbc16056468643e6372c4c68a810ebada6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The presence of numerous embedded links, many pointing to external PDF files, suggests a link farm or SEO manipulation tactic to drive traffic to malicious sites.

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.com/123?keyword=number+sense+uil+test+pdf In PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/fivogapu.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/8195755.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/fixirelabul-rowerixiwonivo.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/tujimuxegexug_mekikizo_towekarevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1043bf8f-a9a6-42f9-95c9-a27f8a1396be/41836596984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bec125-cfd1-4c28-9bad-d81188b17ccf/the_art_of_strategy_a_game_theorists_guide_to_success_in_business_and_life_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff26a0e-7a87-4cdb-9bda-20f4859cc720/78512772848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9192/2596/files/48326143025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1688/6678/files/proteinas_vegetales_texturizadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1704/3619/files/diccionario_lunfardo_argentino.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/albert_camus_the_fall.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/mapedujetapu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/antiphospholipid_syndrome_acog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/christlike_attributes_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6609/7309/files/13842733919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2860/4067/files/router_spy_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4952/3621/files/denver_county_jail_inmate_search_mugshots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1243/0230/files/50981961871.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_off000076bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BB 5088 bytes
SHA-256: 618b3c92050b4125958f0c813fba1d8c26ec5eb91f244f30afacce83cc98d6f8
font_01_sfnt_off000087ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EC 11300 bytes
SHA-256: d903469f4079f4e5d6e17c88418f89c27cef109468d350fd1cfba611dad47044

Open this report in the interactive analyzer, or submit your own file for analysis.