Malicious PDF — malware analysis report

Static analysis result for SHA-256 1766aff9b07290a8…

MALICIOUS

PDF

48.3 KB Created: 2020-08-06 12:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 711ff2ff725c94e5b63b0cb93294f3ae SHA-1: 2d3bad6b532704b279a0125d8fe48666815eebf2 SHA-256: 1766aff9b07290a8917c9f20701cd492dd02a258006f93fea92188c98a4eb1ff
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a likely phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=boost+your+self+esteem+pdf In PDF document text
    • http://files.eatdelirium.com/uploads/1/3/1/4/131453206/leponedujadigapusoxu.pdfIn PDF document text
    • http://files.corktownstudios.com/uploads/1/3/2/6/132696351/2116729.pdfIn PDF document text
    • http://files.ottertotsplayandlearn.com/uploads/1/3/1/4/131454272/a52f4f79547fb.pdfIn PDF document text
    • http://files.newpathway.co.uk/uploads/1/3/1/8/131857049/8e26b.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/1/0428/2476/1507/files/tazaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/52772504420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/63388364603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2334/2495/files/92831921359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2493/0200/files/karmasandhan_bengali_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/36162422390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/pagujabufosomom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4569/0261/files/xutatisatovexam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/87782077272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2783/2733/files/fubawuwagona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/vibomurekowinokenojenabim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/newadozovufitibuzavobo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off00007f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F71 5128 bytes
SHA-256: 10b6eda1b27b5a624c1c0b668ab67da80b748fa7996832f7258c17b724ef1776
font_02_sfnt_off000090d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D8 10204 bytes
SHA-256: b6e413b9f34f8a48dd6d14f6d9b6fb9147b2a13f3e27958c7b6ee7bae4dcc3ed

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