Malicious PDF — malware analysis report

Static analysis result for SHA-256 18baa4751b124de1…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 19:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40ed70cd4f7886081c308161c3e6c2b5 SHA-1: 993a833a54d078466dd75d972d2decae5c8238b3 SHA-256: 18baa4751b124de1a7985b0eeb95994c4dc1f24ff93764a59feed067bb9783ce
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The primary redirector URL is https://ttraff.com/pify?keyword=algebra+1+solving+equations+word+problems+pdf, which is also identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs and appears to be part of a link farm strategy to improve SEO for malicious 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.com/pify?keyword=algebra+1+solving+equations+word+problems+pdf In PDF document text
    • http://pexukit.dandeanfinancial.com/uploads/1/3/0/7/130775413/valikipibobifif_tozagedavasag_jofipefuwexuzor_kalarebilovunip.pdfIn PDF document text
    • http://files.cfolcconference.com/uploads/1/3/1/3/131384429/6818747.pdfIn PDF document text
    • http://files.crmag.com/uploads/1/3/1/3/131382346/5794293.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/1/0437/5638/8510/files/40214440418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/linux_export_path.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/getanevajukitexapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/bukhari_sharif_in_bangla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/nvidia_driver_install.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/72428866165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/8723937746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/bash_commands_in_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/rumomas.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 5

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_off00007146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 5820 bytes
SHA-256: 114fac68d87e16831ff6c5582817d6490416f10329088332f8f1d4de654ae559
font_01_sfnt_off00008514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 10340 bytes
SHA-256: 4d24bbfa6826f1426973e78721050247f410b3a4d9eb31a437e9646d4e917907

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