Malicious PDF — malware analysis report

Static analysis result for SHA-256 53603d4c35973fcf…

MALICIOUS

PDF

71.3 KB Created: 2020-08-10 07:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac87e7061c6d80ba263c07eef3816d0e SHA-1: 75c940e4b56953e16bd8ea45186b46aace7298ae SHA-256: 53603d4c35973fcf763ed77b9c4dbc5b1f133b6b13323b9db9823abd61c8cd4e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, indicating a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly supports this, and the presence of a link farm (PDF_SEO_LINK_FARM) suggests an attempt to broaden reach. No scripts were extracted, but the document body and metadata suggest a lure related to a declaration or official document.

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.ru/pify?keyword=declara%25C3%25A7%25C3%25A3o+nostra+aetate+pdf In PDF document text
    • http://files.pembinavalleystudiotour.com/uploads/1/3/2/6/132681336/vibukewopatelelagat.pdfIn PDF document text
    • http://files.cjministry.info/uploads/1/3/0/8/130813992/5717fd6.pdfIn PDF document text
    • http://files.feldenkraisintoronto.ca/uploads/1/3/0/7/130775275/butapidevixiri.pdfIn PDF document text
    • http://files.playcaresrc.com/uploads/1/3/2/8/132815015/felikexopekovogexad.pdfIn PDF document text
    • http://files.yergens.net/uploads/1/3/1/6/131637178/1890600.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/1/0431/2960/2205/files/supidumofolijeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/biochemical_test_for_staphylococcus_epidermidis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/lulefebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/16644269992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9424/9377/files/ap_reorganization_act_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/23795329524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/rukutesanibovadelebudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/54676981676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/narelawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/vusowutolususezesezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/40114387262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/tideponikedumanoro.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F5 5648 bytes
SHA-256: 1fe9ad6399d8ec0fa08262e6bdeb07acb1d8b828c900c10de8397022ea41fa07
font_01_sfnt_off0000e766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE766 12908 bytes
SHA-256: 69a1a4fef3033f08a1b94ce1e5d664ebd3ab9e2f06e4ba3aa7e2ff8c86d61ee7

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