Malicious PDF — malware analysis report

Static analysis result for SHA-256 1698934908e9d6c5…

MALICIOUS

PDF

49.6 KB Created: 2020-07-31 20:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ac4d930cebc94e1b4f98dba069db2de SHA-1: fb2da284bf9ea8b4713397cd2904440e4ce1de10 SHA-256: 1698934908e9d6c56668b57dd36d1ed2281aa32bb1c73cf928c8a23af5782c71
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for SEO spam. The document body, though heavily obfuscated, contains text suggesting a lure for educational materials, specifically 'maths puzzles for class 10 with answers pdf'. The primary heuristic firings indicate the PDF is a malicious redirector and part of a link farm, aiming to drive traffic to potentially harmful sites. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly suggest malicious intent.

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/wb?keyword=maths%20puzzles%20for%20class%2010%20with%20answers%20pdf In PDF document text
    • http://files.maaloufashford.com/uploads/1/3/1/4/131438427/3313529.pdfIn PDF document text
    • http://files.senekal.biz/uploads/1/3/1/6/131606128/vupanejobe-dirivu-tazutivifon-bazuwavonisid.pdfIn PDF document text
    • http://files.noaries.com/uploads/1/3/1/3/131384113/zitukavodesorodu.pdfIn PDF document text
    • http://files.drifterbrewingsystems.com/uploads/1/3/0/7/130775244/detenote.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/1/0431/7295/4269/files/rixakefisus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/38242492275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/79826032700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4477/2757/files/42080368207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/pagigavebulufadil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0925/2250/files/sixefafuwum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/72068432346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/monazata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/zugajawinodulilosudetiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/3916508601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90840236881.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_off000081c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C3 5584 bytes
SHA-256: 0c5e62fbbcc5450ef9b5c77458a70459b9c2ffeb808e23e72d5c6896c002cc75
font_01_sfnt_off000094eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EB 10788 bytes
SHA-256: a0a6a895e45e23b49c72c256e134df5d7f1ce8f6f7ce7d411a15bc9decf20230

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