Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b62f8e5beb8185…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 18:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d64ed659a62fc13d211598023ebdf15 SHA-1: 990e7d1cf0c897365acf4a0c313d258c2d5cd352 SHA-256: b4b62f8e5beb81853c6fb9b5325639738721cbd3a63e4fe8c021d3eac9689582
134 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. The embedded URL, 'https://ttraff.cc/pify?keyword=bodies+of+water+definition+worksheet', is identified as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which can be abused for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=bodies+of+water+definition+worksheet In PDF document text
    • http://files.jamesedwardbecton.com/uploads/1/3/1/4/131453350/2714723.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/1/0434/0531/2156/files/digimon_world_ds_digivolve_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/nabucco_libretto_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/77541574148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/cain_and_abel_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/revonezusega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/fateropikaziganunaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/80782229177.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 1

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_off00005cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF3 5168 bytes
SHA-256: bf3348e181fa7674d34f5af10dfd65999c72cbbb9e4a41a6b602d60ec05d7d61
font_01_sfnt_off00006e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 10228 bytes
SHA-256: e94723ac0fc50941856d59791455e19dd9fb5642a1cb83fe30aa261e252c3e10

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