Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa2f9f2c4a82808…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 05:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97e85f3fdda7db48e770d1ea1faeeb95 SHA-1: 44dfe6bb9c7f5804cc742211349ec68f3c9b4c75 SHA-256: cfa2f9f2c4a82808f83bcf0d60715e56782059857de84c7309b0bcd50382c840
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 a redirector service. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a deliberate attempt to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=ribbon+in+the+sky+stevie+wonder+pdf In PDF document text
    • http://files.angoloitek.com/uploads/1/3/2/7/132712093/59651.pdfIn PDF document text
    • http://files.skinnykittyfarms.com/uploads/1/3/2/6/132695663/tudozerinura-boterozab-topun.pdfIn PDF document text
    • http://files.getoutandseesomething.com/uploads/1/3/1/4/131437242/35f0d853a.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/1/0432/0657/4240/files/86254469013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/chemical_bonding_a_level_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2566/7995/files/google_dorking_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7074/9849/files/pdf_file_to_word_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/gurukafarudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/convertir_en_ingles_a_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2583/files/76766698602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/vutibex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/fapotemiwapukepawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/18894719321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/zafigixomomunen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/nuluvebalujabefipesa.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 3

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_off00005780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5780 5140 bytes
SHA-256: 8678b77a6a8e0a8de5ec96eb300e21b9398247f2cff893fc0220c96d18a70e8a
font_01_sfnt_off00006900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 10060 bytes
SHA-256: ebf2f40744d631b2a1da00a381e07f108d524aca931723e0604e14a9258d47e7
font_02_sfnt_off00008b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B42 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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