Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb071075606fc1b1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 01:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c682dcb7974108c45494ce8fb659639 SHA-1: b6369ac1240b314e4386595a8add8fc11ca53cd0 SHA-256: cb071075606fc1b1f31591fb8946b4d416ac4a8a0e269084ee641704b302f6dd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains references to 'Turnitin plagiarism spectrum pdf' and a URL that further supports this lure. The primary malicious IOC is the redirector URL, which is designed to lead users to harmful 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=turnitin+plagiarism+spectrum+pdf In PDF document text
    • http://files.recbarlouisville.com/uploads/1/3/1/4/131452811/wuwojubegenoko-welajokiwuwofis-xofobedulu.pdfIn PDF document text
    • http://files.georgelingpix.net/uploads/1/3/0/8/130814513/2146557.pdfIn PDF document text
    • http://files.limerickcommunitygrocery.com/uploads/1/3/0/8/130874296/setagimebetawef.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/1/0435/4464/1695/files/2005_dodge_ram_1500_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/keborudufosovakasazilul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/gopigetegufupoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5658/5111/files/42448347474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/63550632559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/68403645248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/78809921001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/35046784568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/29761496966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/xevoxadatof.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 5

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_off000069e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E1 5424 bytes
SHA-256: d1b2f0b719b4fdc2fc6919e5bdf1088eea9ab57742741b108484511ab5937591
font_01_sfnt_off00007c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 10304 bytes
SHA-256: e48eb47b8d5f7c74fdae6eba98d56efef608bcdada7ed2d79b4013bb6f8e3fce

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