Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5552db1f73622a0…

MALICIOUS

PDF

69.0 KB Created: 2020-08-11 00:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 338ad8216151c2aa8d7036c7e49bfd84 SHA-1: 3367546e45c71a9aacdc541deea1b03894189e15 SHA-256: a5552db1f73622a0af08e7dba1b8d25aa9f46085bf475f02c42103ce7d46fba6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness.

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=bagehot+lombard+street+pdf In PDF document text
    • http://files.smsdblueeagle.com/uploads/1/3/1/4/131406344/novutiromatise.pdfIn PDF document text
    • http://files.jcira.org/uploads/1/3/0/8/130814070/ee140362e3d9b1.pdfIn PDF document text
    • http://files.lightfactorystudio.com/uploads/1/3/0/8/130814133/gumip_megujipisibeker.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/1/0429/2853/7753/files/15500776963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/sojorib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/45297346502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/35617727209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/jowarekekiwozikib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/cambridge_checkpoint_english_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugomedimugatusigoxafif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/pexulizare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/medical_aspects_of_chemical_and_biological_warfare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/jamamimojadofemunax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/11746384072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/mockingbird_walter_tevis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/lonely_planet_georgia_free_download.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 4

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_off0000d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 5644 bytes
SHA-256: 5db717c1fa2f7a6943183f20a2431641aea7c128942feb6a22d47f49f5339102
font_01_sfnt_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 10596 bytes
SHA-256: 83731f362d91faeb0db0c246baef659e8c031fd078eddc9a0f9f5716a616808f

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