Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab73a2c9e0a40922…

MALICIOUS

PDF

36.8 KB Created: 2020-10-26 02:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 19b499236dcf7e4255a82c5d5fa5368a SHA-1: 6e0506eed1a810537c111a705655aa96bcadf318 SHA-256: ab73a2c9e0a4092230329641544798ef2982846f9f47360c29a672c4aa5e53d5
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.cc/123?keyword=an+inspector+calls+york+notes+pdf In PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/a270023171d3.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/tisug.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/busaxes.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/41a85a5884adaf.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/df4687ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f909381abb19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f92df864282a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f8f00c216ecc.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/2142296.pdfIn PDF document text
    • https://xuwudavalibabiv.weebly.com/uploads/1/3/4/3/134321130/a99dc.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/xojapimogetotipugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8f223226192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f8d4f6c5242e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f8f940f221b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f961556e7c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f96105cbb07c.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000505c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000505c.bin)
    • https://cdn.shopify.com/s/files/1/0502/3324/5854/files/volkswagen_touareg_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/kimemagaxarepejinavij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2820/1639/files/verbo_to_be_pasado_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4258/4760/files/f1_acca_notes_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/craigslist_secret_code_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/5855937196.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/samirovujabu.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/caverna_de_platon.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/organic_chemistry_alkene_reactions.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/4809065008.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_off0000505c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000505c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505C 5304 bytes
SHA-256: f352b4f918b519f97738f0d97530449ef03d38b2b931894933ec4a2563699f6e
font_01_sfnt_off00006275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 9848 bytes
SHA-256: 38ba7c285f15e07916fe6fc45354c1e279e8c7d04a6cabad635d652f5d7d19ae