Malicious PDF — malware analysis report

Static analysis result for SHA-256 51116ccc5d3af82a…

MALICIOUS

PDF

49.2 KB Created: 2020-08-10 15:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76473e8dd3acbdf6c5e35ac67913c9b7 SHA-1: 3e1486e720b7fdb940ff1c614677286628efd8ce SHA-256: 51116ccc5d3af82ab26d9515b5ace80a15b1c46f1f13d48fa1c4a541b33b7fed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting a phishing or scam attempt disguised as a book download. The presence of numerous external PDF links also indicates a link farm strategy, likely to improve search engine ranking 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=callan+method+teacher+book+pdf In PDF document text
    • http://tibarozug.multilanguagebox.com/uploads/1/3/2/6/132682663/1890954.pdfIn PDF document text
    • http://files.youngriteusa.org/uploads/1/3/0/8/130814397/4199bb.pdfIn PDF document text
    • http://files.missourivalleychristianschool.org/uploads/1/3/0/7/130775368/jomosatenipomap.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/1/0428/4638/8380/files/15781684981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/33577063884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/satapivepafawipibabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/rowatewikipunodebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/kiadb_building_bye_laws.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/16343777732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/rabilozagigewut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/dialogues_pour_apprendre_le_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/95_lincoln_town_car.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/27778501693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/79601937961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/mosatepopuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/jezijidirusarapanu.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_off000082c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 5328 bytes
SHA-256: 0b6ba9e6e0348d6bcc40d975c87949e17edd90e22bce487f00f59e5c0cdfb895
font_01_sfnt_off000094b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B4 10304 bytes
SHA-256: fe42a92c51ce210568222dc2c1245113e843bf6b88169270fe6ace8dae39ec5c

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