Malicious PDF — malware analysis report

Static analysis result for SHA-256 2739ff5e0fa953aa…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 04:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6cb4d260983aa3a95f7c1eb7aecb57a SHA-1: f06db049a721021ed8013e02e4e9dcfec67b5d09 SHA-256: 2739ff5e0fa953aaa7c98b60ae6c5d67c03c7fde4ab6c23090132603ee4d31dd
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=3rd+grade+spelling+words+pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, 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.cc/pify?keyword=3rd+grade+spelling+words+pdf In PDF document text
    • http://files.alexiguitars.com/uploads/1/3/1/1/131164275/rorodepuporisofewu.pdfIn PDF document text
    • http://pebiluf.cc-sac.org/uploads/1/3/1/4/131452977/livek-kixokekexomupog-xuboxa.pdfIn PDF document text
    • http://files.abbi.ca/uploads/1/3/2/8/132815388/ec4634d5fb6857c.pdfIn PDF document text
    • http://files.bunniesandbeyond.org/uploads/1/3/1/3/131379443/04c04182a27c.pdfIn PDF document text
    • http://tovamasof.anneduffforeducation.com/uploads/1/3/0/8/130874457/wimuno.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/1/0435/4211/8555/files/phenol_sulfuric_acid_method_for_total_carbohydrates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/amblyopia_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/ancient_history_by_rs_sharma_old_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/cardiopulmonary_assessment_physiotherapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/35813133530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/tusomexirebuleloparozexav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/70489124783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/96933465119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/81807181608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/32337973715.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_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 5368 bytes
SHA-256: 8a1a772dde4d321e1e27d4d53bbed0ea93ffb02260621327eaff9d7d29d676c5
font_01_sfnt_off00007679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 10428 bytes
SHA-256: f263879de03f6719b4c61303cc81f49899c99cc396ea83187f9c0af883bbc465

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