Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a4774fcea1149d…

MALICIOUS

PDF

39.2 KB Created: 2020-09-16 16:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00764a51376ffac70d9f77ff8d89073b SHA-1: 08de3c5a1cef2da845ff6282664494a2b8c49910 SHA-256: 16a4774fcea1149df9b079eef2e8c577c45d2ee698442c2b30b5a1db5343ece1
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a likely attempt to direct users to malicious content or phishing sites. The ML classifier strongly flagged this PDF as malicious. The embedded link 'https://ttraff.cc/wix?keyword=volume+of+prisms+and+cylinders+worksheets' is a critical indicator of malicious redirector infrastructure.

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/wix?keyword=volume+of+prisms+and+cylinders+worksheets In PDF document text
    • http://gegupekip.ewa-europe.com/uploads/1/3/2/6/132681378/4737078.pdfIn PDF document text
    • http://kogudaka.paintedponytattoo.com/uploads/1/3/1/4/131406665/1340132.pdfIn PDF document text
    • http://rulefife.caitlin-cannon.com/uploads/1/3/0/8/130874368/735b392217b3.pdfIn PDF document text
    • http://wululig.unitedtrainingtrust.com/uploads/1/3/1/3/131398547/zuwujeruwi.pdfIn PDF document text
    • http://files.stonycreekpembrokecorgi.com/uploads/1/3/0/8/130815009/1123854.pdfIn PDF document text
    • http://files.ashlihurt.com/uploads/1/3/2/6/132681026/worotodoxipofosetusu.pdfIn PDF document text
    • http://files.sugarandheartbakery.com/uploads/1/3/1/8/131856270/bd3f0cc20c.pdfIn PDF document text
    • http://files.partonscience.com/uploads/1/3/1/6/131607047/c5a4d06684ba.pdfIn PDF document text
    • http://files.livingbalancedesigns.com.au/uploads/1/3/0/7/130739532/57f3de.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/1/0434/7042/2180/files/lebizemabazejezodavil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/13721095421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/javijuwuwarudaxunuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/ditodotajilip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5032/7455/files/appendices_in_a_report_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/dizisobapolumipuvel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/rewakafufijoxinoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/13413388624.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 8

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_off00005a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 5616 bytes
SHA-256: be9bf56872aa05f0fa48e119235b3852278858ef7f69d9264efe89ee94afca48
font_01_sfnt_off00006d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D35 10088 bytes
SHA-256: 691f99a66ab2ad5fbc687e844097b4bd14d00a50393bcb8bb9b18e9b889309cf

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