Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20b7a5ac84336d3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 12:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 017b00ea06deb1cf6770d04d7e6eca6d SHA-1: c23db9eb5119aeffc23316c30deaca6faa1c0373 SHA-256: a20b7a5ac84336d369d589d5ede6a6e8259836e11f9a84f9f7580655e5b69429
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=rodalies+renfe+r4+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to lure the user to malicious infrastructure.

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.com/pify?keyword=rodalies+renfe+r4+pdf In PDF document text
    • http://files.unbndglobal.org/uploads/1/3/0/9/130969505/rajijizipawuzezok.pdfIn PDF document text
    • http://files.birthbeforeandafter.com/uploads/1/3/1/8/131871786/7766033.pdfIn PDF document text
    • http://widekum.us-msminer.net/uploads/1/3/0/8/130874050/betupepemugov.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/1/0430/7533/8391/files/82952042591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/aristofanes_comedias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2784/0675/files/mv_command_in_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/42419495419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/alkanes_alkenes_alkynes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/sa_li_file_khng_m_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2472/files/lakuzufopubafoduxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/30223132750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3769/3851/files/java_word_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/34336841488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/bivejara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/nadafumediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/fozamil.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 3

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_off0000604f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604F 5132 bytes
SHA-256: 28af3dfb59bbb40bb25a755a3e059ea9bcc5ccb000ae4c01ede6d1df366a8f07
font_01_sfnt_off000071dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 11756 bytes
SHA-256: b3d6232bad6cb46b1e51a9028d5589e8896e9e9108efca344a4fff76e67a8b7a

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