Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a750b4e1285cd93…

MALICIOUS

PDF

68.2 KB Created: 2020-10-29 04:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2b6ade3b2b93577ff5834d0a3fea3a46 SHA-1: 352165143dd7dccea63ffb3a5c3371ff1540d6b7 SHA-256: 7a750b4e1285cd93bf8888756ac576915391ae4f66e0cd52c7df72914bfa2da8
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 a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://gettraff.ru/strik?keyword=the+house+on+mango+street+journal+guide+chapter+21, which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure.

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://gettraff.ru/strik?keyword=the+house+on+mango+street+journal+guide+chapter+21 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87023283f79.pdfIn PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/demir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f8b31c718e9f.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/2355095.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/ratekol.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/bimatizazusek.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/7384911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f8d82df0ede2.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/tetofamuxulil/ishakamusa_barashango.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6429/6092/files/sazoxinef.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/eva_dry_dehumidifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0105/2836/files/catalogo_de_herramienta_truper_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9376/0435/files/home_depot_nascar_race_car.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/31584096972.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/cancer_de_mama_inca_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/air_compressor_kit_menards.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/alliteration_poems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6153/7689/files/87602775532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8881/7562/files/nc_state_university_club_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/pharrell_tattoo_removal_before_and_after.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/dosuxiduzadadukomogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9464/2340/files/magnificat_de_taiz_partition.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/78787932899.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_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 5696 bytes
SHA-256: bff24c3fcacbdc8e6b57041f2b66e66ffd22cfd93011cc4c8bc208aba21c260d
font_01_sfnt_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 10832 bytes
SHA-256: 8e12ba4180199a390fe5d1805b3c29af61792c718de19e07174c48ea4cc420c0

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