Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a746688d4910834…

MALICIOUS

PDF

40.3 KB Created: 2020-08-11 01:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec933e273c9f0f9cbcff7dc802df205e SHA-1: 6b2294aa2e12b103ecc96e88542151501c4d0da3 SHA-256: 8a746688d4910834b3980378c8de45bfb022432aab663d0e8911ce1fdf4286be
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure at https://ttraff.com/pify?keyword=validity+in+testing+pdf. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains the same redirector URL, indicating a lure to external malicious 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.com/pify?keyword=validity+in+testing+pdf In PDF document text
    • http://files.alanflemingtournament.net/uploads/1/3/0/9/130969129/86d1bfe.pdfIn PDF document text
    • http://files.lo-phi.com/uploads/1/3/2/6/132682528/5287344.pdfIn PDF document text
    • http://files.pureloveandlightcentre.com/uploads/1/3/2/8/132814306/f371f5a00c16.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/1/0437/6897/1418/files/solo_leveling_novela_ligera_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2583/files/54706915587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/85931337228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/27045654433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/51983027245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8142/1215/files/theoretical_studies_in_islamic_banking_and_finance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/wesuzini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/penguin_books_elementary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/r_plot_axis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/nugupevaregeliwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/22547956639.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 6

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_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 5180 bytes
SHA-256: ea7e8f343a981639c389bac1eb8d731bf5346e090cba23d219ea9b30d6403355
font_01_sfnt_off0000724e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 10020 bytes
SHA-256: a903d15ed7c40c5d638cc2f32fc15b6749d6c74cc0863069f5d5aeec15b8ab6d

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