Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39d2f09beda9db2…

MALICIOUS

PDF

73.7 KB Created: 2020-08-09 01:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75b884990ed440c7d8eb7dad928a6cfa SHA-1: bfba642e81f7150e44d80d79829d0067ed80a453 SHA-256: e39d2f09beda9db2d34ffae825f1012b319c81d8cf20495e38f7f2761cc854e6
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains references to 'Cebuano grammar pdf' and the wkhtmltopdf tool, suggesting a lure to disguise malicious content. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=cebuano+grammar+pdf In PDF document text
    • http://files.thejoyfueledteacher.com/uploads/1/3/2/7/132740905/texanuko.pdfIn PDF document text
    • http://files.rhccfd.org/uploads/1/3/0/9/130969580/mogawenoxorudodijug.pdfIn PDF document text
    • http://sejofo.client-minder.com/uploads/1/3/1/4/131438177/bumivixe-dewedi-zubogate-werejokepe.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/1/0433/0687/7080/files/78992801071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/mifoxofik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/10336544702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5803/6889/files/xanumepudizimamejatap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/25260199181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/satatelulepigariwezoluri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/estadistica_descriptiva_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/how_to_create_a_book_using_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/79157206586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/wavuzidosutalasosutop.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 5

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_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 5196 bytes
SHA-256: 3d16e57c01b5d5bd353f0f56a4193d909d8a3fdf7a351e96607d011bc83e1960
font_01_sfnt_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 14724 bytes
SHA-256: cbf1db509f9a473e995507f25aab595d3205f480f7f9ad091ea84f8fc0ca1567

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