Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6838dabcd8cfeb…

MALICIOUS

PDF

57.2 KB Created: 2020-08-10 03:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 744b702e826c6b211abffefef0d93776 SHA-1: a5880618162c397c110d55ab8f58453580dd3929 SHA-256: 4b6838dabcd8cfebed21eadf4957ace8b54b268e483d9298d2d7d3bc0c97e3ce
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=materialismo+historico+pdf+completo'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0430/9201/7305/files/kemofemujuzalunivexuj.pdf'. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

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=materialismo+historico+pdf+completo In PDF document text
    • http://files.dentalimagingconsultants.com/uploads/1/3/1/3/131383575/99faa.pdfIn PDF document text
    • http://files.mattevanskc.com/uploads/1/3/1/4/131453465/dbebe6b6a.pdfIn PDF document text
    • http://files.ospreyfriends.org/uploads/1/3/0/7/130776408/2056532.pdfIn PDF document text
    • http://jinurexi.houseofchina.org/uploads/1/3/0/8/130814328/dujivajovot-gonepuzogulojej-tunasi.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/1/0430/9201/7305/files/kemofemujuzalunivexuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/bifederokananegipagixavix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/dosizumunijozipuzutazudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1548/7137/files/vutibuwuvapol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/xosijivisewupeluk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6711/7463/files/barron_s_ielts_strategies_and_tips_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/31343932752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/395492628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/16971080855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/84695587005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/tawurigak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/frases_avanzadas_en_ingles.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
🗂 Part of campaign: hecklerancestry.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D7 5400 bytes
SHA-256: 25dc15b7a6761fc6f5291d565289b40dc39e7cee71d0fd823c9bbc450a780bff
font_01_sfnt_off0000b414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB414 10292 bytes
SHA-256: 41fc0efe9395d40293e06655a0df755f4cc0b192204c85608ec13e8971a16468