Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f32470fbe145700…

MALICIOUS

PDF

41.7 KB Created: 2020-11-02 01:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e93bda53ceb6409bc3a782aecdac07f5 SHA-1: 79190f16105fb90643f58addab7e4e951bfd605a SHA-256: 2f32470fbe145700dfbab701e909b6e495175ed5030d5f2b09384672be600a0c
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://gettraff.ru/123?keyword=avast+premier+serial+key+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f9a72ac30daa.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/6028b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8f431dd0795.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/1/0268/8450/5778/files/jet_preformance_chips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/32653689736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/23720323917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7894/6468/files/rexegabavumafizipop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a6c55b-392b-4e9b-b24d-95ad1a391b29/14414259429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/mmpa_read_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4287/0710/files/redebidusefeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6467/5490/files/internet_explorer_11_for_android_phones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ddd1e4-69ac-40f9-9122-f5be48604661/xotefofopubituxijoz.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_off000062a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 5660 bytes
SHA-256: 008dcd96f5da68cb7771b04e63dd0d5c48012c408f7c0bf85d3c3fbb21ff0079
font_01_sfnt_off000075e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 10676 bytes
SHA-256: 66953b4e35a3c0c832e69ba38fca5bf091c5d839fc8ce38f60fa07a93125d158