Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eff6c4b3d9ba81…

MALICIOUS

PDF

50.5 KB Created: 2020-08-15 01:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b629a6115755b22de3c9f914b7bbcbed SHA-1: 39d5b010dc616e075c88cfdd837bd60f2b33e26f SHA-256: f4eff6c4b3d9ba81a81f9d1c0c597f8ef4b981e676ed75b5ebc923581d2866de
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the URL for the malicious redirector, suggesting a lure for SEO poisoning or phishing.

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.ru/pify?keyword=html+color+codes+pdf+file+free In PDF document text
    • http://files.esparzafc.com/uploads/1/3/1/4/131452922/kovopibikusobi.pdfIn PDF document text
    • http://files.trishgipsonphysio.com/uploads/1/3/2/6/132682051/7270024.pdfIn PDF document text
    • http://files.eddiejosemorales.com/uploads/1/3/1/4/131407233/ripojove_kejiroduvi_wegapotib.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/1/0431/8180/1629/files/kurigimizikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/nejabibavilaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/60650563909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/65152770514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/54986341355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/catalogo_eudora_dezembro_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/not_enough_items_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/11759369851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/22847864453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/guru_mann_muscle_gain_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/mukugasoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/81176453610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/bed_sheet_texture_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.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 4

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_off0000698a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698A 5052 bytes
SHA-256: cd0cce301b4f144df3392448a620465e2b92ff9e5c76cc19b96ec0c456654dea
font_01_sfnt_off00007aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 24444 bytes
SHA-256: 10f4221919f573f2d3a28026f76337dcf432f2a77871571def080c4789626f0e

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