Malicious PDF — malware analysis report

Static analysis result for SHA-256 220c25f7024aa27e…

MALICIOUS

PDF

49.8 KB Created: 2020-08-25 14:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8728ff0caf7aaaabf7c3547738dad82a SHA-1: d1d8cba78e2ee7254d85c3545c55d6075e8a588b SHA-256: 220c25f7024aa27ee61d235e248bc09524c1a523d6465eab9325c558a4b0af2f
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=improve+your+english+vocabulary+book+2+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, one of which is 'http://files.greendentalpractice.co.uk/uploads/1/3/2/3/132302928/a49a9b.pdf'. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to trick users into clicking through to potentially harmful content.

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=improve+your+english+vocabulary+book+2+pdf In PDF document text
    • http://files.greendentalpractice.co.uk/uploads/1/3/2/3/132302928/a49a9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/barska_stolica_forma_ideale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/annotate_using_apple_pencil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9667/7279/files/sodium_alginate_beads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/33895429097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/championship_riven_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/19985518580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/nuwisulipugefofefixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/dnd_giant_badger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/honey_mustard_chicken_thigh_sheet_pan_dinner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/grade_6_math_worksheets_ontario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/rirekefufekinugubonaf.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 5808 bytes
SHA-256: b651bc0dacc417da1bc8328600c2025213b0df3fb3319d4e315cb1f95f8b3bf2
font_01_sfnt_off00008985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 10120 bytes
SHA-256: 5ff15852f8a782252b600eebb577f82eb51d6be7cc1e0effd4a12575972ecb30
font_02_sfnt_off0000ac23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC23 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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