Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d3f3b8b6744ae2…

MALICIOUS

PDF

66.4 KB Created: 2020-08-16 20:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 484ae534e91a559d28fd5a62e75d0f39 SHA-1: da478d692895c89cd882412113bc54298c96e853 SHA-256: 53d3f3b8b6744ae2178b254fe865ffe75183ca464a3279a4a3a925e3a365e8d0
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating redirection to known malicious infrastructure via the URL https://ttraff.cc/pify?keyword=calendario+serie+b+2017+18+pdf. Another critical heuristic, PDF_SEO_LINK_FARM, indicates the PDF is part of a link farm, likely to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and benign-looking PDF filenames, suggesting a lure to drive traffic to malicious sites.

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+serie+b+2017+18+pdf In PDF document text
    • http://megananid.dawnanntotten.com/uploads/1/3/0/7/130738732/guwul.pdfIn PDF document text
    • http://files.alaneschbachauthor.com/uploads/1/3/1/3/131380341/bb926c69.pdfIn PDF document text
    • http://files.maisonmiroir.com/uploads/1/3/1/0/131070861/bed9e.pdfIn PDF document text
    • http://files.ebooks-by-crooks.com/uploads/1/3/0/7/130775750/sejapenonilato.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/1/0428/3265/8588/files/68331108885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/20310157485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/30341868787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/2768995268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/1071844376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/nevuwabenekem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/assembly_language_commands_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/90155724472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5679/8613/files/bronx_tale_soundtrack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/7908390900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/fupumelaw.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_off0000c1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AD 5680 bytes
SHA-256: 82185a554ec2a8cf72ae971a01e5f42939471e7db469092a92ca6743b782ad8d
font_01_sfnt_off0000d515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD515 11520 bytes
SHA-256: 023f24911aa3876cd5679aa73c7f4673be17eab958485e980199b4f4fd95b603

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