Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa324320c5b13fb3…

MALICIOUS

PDF

43.9 KB Created: 2020-11-03 11:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 82ee08b0387b8dd772c264e3673d7a4d SHA-1: 06be8aec1283177b34c46efbc637582b41b4fb8a SHA-256: aa324320c5b13fb3a5dcbb246e099e8226f2098721f19d045da503915316ffbc
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=toshiba+satellite+c655d+manual+pdf In PDF document text
    • https://duzikasaropofe.weebly.com/uploads/1/3/4/4/134489835/lusolaxopojox.pdfIn PDF document text
    • https://titenukom.weebly.com/uploads/1/3/4/5/134523185/tutokuko.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/25363a61-8dc9-40ad-83e2-c967781c7ffc/86590636039.pdfIn PDF document text
    • https://s3.amazonaws.com/kalufizefem/chemistry_lab_manual_timberlake_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a95166d-4ec8-4865-9fd6-4d99ff7d4b4d/analisis_del_ensayo_el_chango_como_p.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/purepufisosuvukejosewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560b0b7c-a9f6-4ea7-99a4-c146f7c4f767/zizarubojevazadiput.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/autumn_starting_here_starting_now.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/florence_county_sheriff_department.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/mail_flower_mound.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/blue_is_the_warmest_color_book_free_download.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_off00006b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 5668 bytes
SHA-256: 0b9e84749e490e64387a9ff0ff0148f2c5c7c0a6997399da5558dfdb8fe55ccf
font_01_sfnt_off00007e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 10700 bytes
SHA-256: 70d112140f0f564b37db45d86a9776abaf9731f915b15bf5e7c4adb6e8c23e81