Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3dc0c460bc731d…

MALICIOUS

PDF

49.4 KB Created: 2020-10-30 08:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 53c3e5f4157e5eef3599e0fa874f26af SHA-1: e6b6beda61102d76e22e2cf05bf9481ad12ddf63 SHA-256: ff3dc0c460bc731d5bcf916d0d82df534dc0151d62faefedbf84d36b61019ecd
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=vidmate+apk+download+install+old+version+2019 In PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/rirebubovatatiwimol.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/labitajaxatufib/73062116946.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/juzubafisu.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/ceftriaxona_bula_blau.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1423/2485/files/55048682322.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/easy_drum_songs_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/lazir.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/posusanisusitep.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/widorivem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/kufugovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5421/1487/files/66566716316.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/wumokofirebaluw.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/bumizeneberavaze.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/blockchain_trends_in_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/happy_tree_friends_wiki_cuddles.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_off000081d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 5768 bytes
SHA-256: 1933c75a369d9d306afecfbc868ee18285b07f3d4528ec5ef2bdff7f00ab7dca
font_01_sfnt_off00009574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9574 10236 bytes
SHA-256: 80bfab0897e53464346fa86850a125f7bf4b16230091646f3fa6eeb36c462d5e