Malicious PDF — malware analysis report

Static analysis result for SHA-256 73deb91b8f8fc21b…

MALICIOUS

PDF

39.8 KB Created: 2020-07-29 15:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e12e3285cfc5c50f2642d6e112e4558b SHA-1: f681871d3eab6f26a17c82e9c6ec31b7e80ab523 SHA-256: 73deb91b8f8fc21b48036b5623776b7f718e7a16e01264685e198f08651fec3e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to educational PDFs. The primary malicious activity observed is the redirection to the URL https://ttraff.com/pify?keyword=philosophical+and+sociological+perspective+of+education+pdf, which is likely used for phishing or to serve further 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=philosophical+and+sociological+perspective+of+education+pdf In PDF document text
    • http://files.philipestrada.org/uploads/1/3/1/4/131406448/judofa_wokelow.pdfIn PDF document text
    • http://files.vickylneal.com/uploads/1/3/2/8/132815882/nemat.pdfIn PDF document text
    • http://files.thunderrunners.co.uk/uploads/1/3/1/3/131381518/tijajopedizevepud.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/1/0431/2937/2836/files/golare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/lilelizavevuvomofoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/83568447086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/pevaxepiturikobawev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5700/5222/files/fofibezavewulufisan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/dubuxuxefeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/39923068749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/bosezexoronarifisujalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/426851441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3955/3696/files/temowibina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/95119885152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90841244024.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 7

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_off00005a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8B 5360 bytes
SHA-256: 9c9b6ce37f6b2da2162957c2beb1ee14cd721d4ca8a2dd974ecf4281fe68b782
font_01_sfnt_off00006cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB9 10428 bytes
SHA-256: 5d023e0231080829083a07808d3ab88f219fcc85a22cc0910a944924d47d8d77

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