Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ad7f51a08120e9…

MALICIOUS

PDF

43.9 KB Created: 2020-11-01 08:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e84ed2448dd3148e80065609c45c1169 SHA-1: 19a67d5139d96a1d1253d97d4d8688ac6cbf255c SHA-256: 43ad7f51a08120e9e96c9756d3e3bff3c34908e91607b0814f83d53aebabc61f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body and embedded links suggest a lure related to popular media to entice clicks. The ML classifier strongly flagged this PDF as malicious.

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.club/123?keyword=fear+the+walking+dead+hulu+release+date In PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/ab567c41b4.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2305/5010/files/surah_al_kahf_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2033/5273/files/41058952882.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/92990933205.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/varney_the_vampire_plot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6704/5556/files/telemundo_en_vivo_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/pleasant_goat_and_big_big_wolf_mighty_little_defenders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8238/8901/files/34527854209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9314/1925/files/18896261291.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/reflected_in_you_sylvia_day.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5935/5041/files/bio_weapon_plague_inc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8030/9672/files/wonejixu.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/30248939344.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_off00006c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 5196 bytes
SHA-256: e522caaf791d28ab27c49ae1a073eb39297210b68884693ee5873bc0b29c56ff
font_01_sfnt_off00007e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E11 10716 bytes
SHA-256: a443835a16a9d336fc349f0c69f21918d8f7861809dea894aa276769d54ead3b

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