Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdccec5b27afaba0…

MALICIOUS

PDF

54.3 KB Created: 2020-10-30 10:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d1c819f1c5dbb3d712a2de8c7e5194fe SHA-1: b05d2b2ca2d821a44634dce96f484de67957c342 SHA-256: bdccec5b27afaba027b1d063162d00386e6fbc66f65df027d16a04893ea78a77
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.cc/pify?keyword=compact+attic+ladder+installation In PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/1376160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5f8fb484433a4.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/14d6b5da31.pdfIn PDF document text
    • https://kulinamolusamu.weebly.com/uploads/1/3/4/2/134234583/dfded31000a.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/xerobagepi.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/c3794a0e-0329-4d0c-8c74-2d03e919ebaa/73604931179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5723/2034/files/fotorutiwobigev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d877407d-2b0a-4059-b57f-56f7ed5cd15f/caractersticas_de_los_continentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679e9d3e-586e-41fb-8383-c93ac2a43684/the_beginners_keto_diet_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abd82b7-df9a-4e79-ad27-546cb48b4a61/24819807444.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 5124 bytes
SHA-256: 5bb96d2a768a04364ba6ce9e6c8fbf0e49b44688ad1752102e8c0ae8f50c06dd
font_01_sfnt_off0000959e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x959E 9784 bytes
SHA-256: e29b53b883a0ec8b35a9d9d83d46299c521377cd30d7e3cb3e39caabc2e46beb
font_02_sfnt_off0000b72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72E 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c