Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fda53b0dc886b0…

MALICIOUS

PDF

47.2 KB Created: 2020-07-28 21:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64400d105347db271a8a86d44a58c009 SHA-1: 9b1a58f3d38e9e10fff903bd5b08b2fa9d7df933 SHA-256: 09fda53b0dc886b0a77ad3fec8c64645cdc38e15ba3eb6d0a261a98c8b45dfe4
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm and redirector, pointing to a suspicious URL (ttraff.ru). The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain metadata related to polynomial multiplication, likely a lure to disguise the malicious intent of the embedded links.

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.ru/pify?keyword=polynomial+multiplication+examples+with+answers In PDF document text
    • http://files.dyslexiaonlongislandny.org/uploads/1/3/2/6/132695566/bcc626456.pdfIn PDF document text
    • http://files.makwawamalawi.com/uploads/1/3/2/7/132740860/zuder.pdfIn PDF document text
    • http://files.cyclingadventures.net/uploads/1/3/2/6/132695689/sulexovabub_bubizelogu_mekodovi_pinuvawenun.pdfIn PDF document text
    • http://files.gosunkissedevents.com/uploads/1/3/2/7/132711999/eea03738c.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/1/0428/1755/2543/files/45410398507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/tesixorimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9348/9832/files/49575066485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/zuxaxajujulurofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/78632052760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/62054273658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/duwomakuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/kurorulawalafikud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/rebukepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/vozopilu.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_off000073de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 5320 bytes
SHA-256: a15844e21327049667b1bf02f9f9f72c921b738fdd78259914f14f5bff487e90
font_01_sfnt_off000085cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 13036 bytes
SHA-256: dad371562f11db08e60a5519a3a0a51911fb779f4375862441b987781e75906a

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