Malicious PDF — malware analysis report

Static analysis result for SHA-256 37eda5df3a686114…

MALICIOUS

PDF

36.6 KB Created: 2020-08-10 12:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77f07fa5ef77b8f4e18dfe60e963b007 SHA-1: ce80def97239f4f8137a40ccf25491afebfb6df2 SHA-256: 37eda5df3a6861146342442c7a15fee590a255578418fdfc12a0eba746f366b8
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine rankings or redirect users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=bac+cooling+tower+manual+pdf', points to known malicious redirector infrastructure. The document body contains garbled text and some of the URLs, suggesting a lure to disguise the 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.ru/pify?keyword=bac+cooling+tower+manual+pdf In PDF document text
    • http://files.lexieslittlebearschildcare.com/uploads/1/3/2/8/132814996/e17f56af45ca99.pdfIn PDF document text
    • http://files.sherricornett.com/uploads/1/3/0/7/130740221/wilubinapob-jagipa.pdfIn PDF document text
    • http://files.eaglehavenwinery.com/uploads/1/3/0/9/130969405/1163919.pdfIn PDF document text
    • http://files.unbrokenchainart.com/uploads/1/3/2/7/132740214/da709.pdfIn PDF document text
    • http://melane.falsefloorcreative.com/uploads/1/3/2/8/132814930/puzuwesi.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/1/0427/9946/4611/files/dijaxorixakuzirow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/nigopuxirixevasov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/bodilowivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/bepakokedaxakexod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/vida_ejemplar_de_simon_bolivar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/absa_premiership_fixtures_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/51503893876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1577/2059/files/mebabatasevizadisafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/nimosegigubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/chagas_enfermedad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8484/4966/files/45951908446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/90226743590.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_off00004fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA0 5440 bytes
SHA-256: 286f85630dbb80b44684b4ab88cc610171b67bd79a13657d5a786f18ed90078c
font_01_sfnt_off0000621d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 10420 bytes
SHA-256: 696138f1ccf7aa24c30b62ec6e4f74cc3fee8ce13bb453df9b51284d07b6376d

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