Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba6545e137bff24…

MALICIOUS

PDF

42.1 KB Created: 2020-11-02 14:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: acbd3458086ac32d1dc681ef5d43b2df SHA-1: 79dec08f31bdd2a7d88552bb594861a3feafac3a SHA-256: dba6545e137bff24c300c4bb6ab197c8add1b8c74ad8691b5e1440493255f904
134 Risk Score

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.
  • 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=the+last+stand+3+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f9449122356a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f871e52874f2.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/lapaloxadigazi.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/1/0502/9881/4649/files/the_emerald_tablets_of_thoth-the-atlantean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0989/files/application_netflix_android_freebox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4352/5286/files/gold_s_gym_xr45_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8504/4152/files/descargar_afterlight_apk_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0415/4015/files/kohler_triplex_9200_welder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6092/5881/files/fudaxoreridovelebugamud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7488/2198/files/registrar_general_guidelines_execution.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_off0000662d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5248 bytes
SHA-256: f341d8192de85af31c6b56eb13b8781cc83ad2771301784cd62f56c2799af5ed
font_01_sfnt_off000077fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FE 10564 bytes
SHA-256: 93ea3cd7f7d5efa4fd659220e19a7bb41733dd53840449ffeb7a68070d5b6f84