Malicious PDF — malware analysis report

Static analysis result for SHA-256 20db624d8af11cf5…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 06:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e8504033debf8bca337ba06a9c0d709 SHA-1: cc6ea6c51a0dd0ad916d886e1e611677969c72be SHA-256: 20db624d8af11cf56b6cff27bffa265d71f714d5d9d8528e7d15ee27f7fc6ed9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The embedded URL 'https://ttraff.cc/pify?keyword=calendario+laboral+colombia+2018+pdf' is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The numerous shopify.com links appear to be part of a SEO spam campaign to distribute malicious PDFs.

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=calendario+laboral+colombia+2018+pdf In PDF document text
    • http://files.paintedturtle.co/uploads/1/3/1/3/131384115/fb6e72c34255.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/1/0432/6119/8500/files/16087772656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/denulob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxolalinurijelibabozafod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/27897800622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/design_sprint_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7033/files/tikudoxekevenuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/mac_creator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0542/3253/files/fubajovetep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9444/9055/files/40449606449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/65178584856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/khorne_bloodbound_warscrolls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/pixaforobuvisirojipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/bronchiolitis_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/barron_s_earth_science_regents_book.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_off00005cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDF 5688 bytes
SHA-256: f67490a2ace629d8204758b84552f9ad83dc7ce6a268947f1fc3b8a997f95327
font_01_sfnt_off00007021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7021 10552 bytes
SHA-256: 0c18bd06cfb631cdc4a0a85eacdd8f134bf7db63968a1192ab18210335804796

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