Malicious PDF — malware analysis report

Static analysis result for SHA-256 8937b237a7d28bad…

MALICIOUS

PDF

51.9 KB Created: 2020-08-05 05:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd927765dc78bd1b25da6611ac662722 SHA-1: 09f2e88755dc47c7f97c79aa7d588360d8ae9636 SHA-256: 8937b237a7d28badd341b2027dfe53030fa3e50602c6ce3cda0ababa75cc678d
194 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to lure users into downloading more PDFs, ultimately redirecting to malicious infrastructure via `https://ttraff.cc/pify?keyword=first+world+war+history+in+telugu+pdf`. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous links to external resources, many of which are hosted on Shopify but appear to be part of an SEO manipulation scheme. No scripts were extracted, but the embedded URLs and link farm structure are indicative of a phishing or malware distribution attempt.

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=first+world+war+history+in+telugu+pdf In PDF document text
    • http://files.rawseries.org/uploads/1/3/1/4/131454012/2562107.pdfIn PDF document text
    • http://files.sabrinaeisenbarth.com/uploads/1/3/1/8/131856330/1716977.pdfIn PDF document text
    • http://files.akadeltapsiomega.org/uploads/1/3/1/8/131857270/fadila_kuwaselilinuno_gefig.pdfIn PDF document text
    • http://files.eternalimpactmissions.org/uploads/1/3/1/0/131070207/d4ca2.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/1/0434/6055/9013/files/sovofoputobifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/33214883911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/sirosasivirizizababob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/lufoludotavenimetesuludud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/vosor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/wikujofitowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/56907995709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/appetizer_recipes_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/delete_discord_messages.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_off00008d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6C 5452 bytes
SHA-256: 304e2a8cf222ed884bbf21d21fda16268826f8b29c859b8e9a2b5f0030282033
font_01_sfnt_off0000a010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA010 9940 bytes
SHA-256: 5af7c8fb414103f6cdea6e8bdfd6fa8aba386c39211bea175da97f379a4a94bf

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