Malicious PDF — malware analysis report

Static analysis result for SHA-256 71818a8eeeefe557…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 15:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f7fb2288d314b9eb74914775860af38 SHA-1: fb2eb840a7cbdefd7a57658492cd68d1e68750d9 SHA-256: 71818a8eeeefe55704160ae42ad1c3a300f815a8139a22baaceb5b949fceb663
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that matches the identified redirector. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution.

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=metal+melting+point+chart+pdf In PDF document text
    • http://files.innerfireherbals.com/uploads/1/3/0/9/130969051/kelopeg.pdfIn PDF document text
    • http://pekobo.helenaeloisephotography.com/uploads/1/3/0/8/130814328/pawuzibarosezude.pdfIn PDF document text
    • http://files.jalascoaching.com/uploads/1/3/2/7/132740172/6927187.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/1/0429/6769/5509/files/37275516901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/automatic_capsule_filling_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/92889996899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/linux_shell_script_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/12226197943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1266/8066/files/wedese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5754/files/90814967540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/82990727564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2940/4567/files/64437175843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/artocarpus_camansi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/8550320882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/archie_comics_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/kukadujuzoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/wulazibirarajabatotifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/werijadij.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_off000068f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 5396 bytes
SHA-256: 1eec06d8136e90056fdf199d24202f9bf4eada0f7b1a084302124640f1b9241b
font_01_sfnt_off00007b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 15976 bytes
SHA-256: 9732646fd440d6a61225bd00f80eb98a84402f4ed6c63e4fb5e19129271a6bc9

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