Malicious PDF — malware analysis report

Static analysis result for SHA-256 851a882df1396236…

MALICIOUS

PDF

157.2 KB Created: 2020-08-08 21:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c9a5358858ab1c77e9894c50bb833c6 SHA-1: ef07cd6d4dca1027f9df6573dc3e776247474976 SHA-256: 851a882df1396236fcc91ec5fd0dc12ca191ac6f46686f900a2e1d31f2a26239
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting the primary purpose is to funnel users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=begrijpend+lezen+groep+4+werkbladen+pdf In PDF document text
    • http://files.lovelearnshare.com/uploads/1/3/0/9/130969194/4847805.pdfIn PDF document text
    • http://lotozani.sjcustompaint.com/uploads/1/3/1/6/131637136/kitekevarupef.pdfIn PDF document text
    • http://files.toejar.com/uploads/1/3/1/4/131410007/wufifesun_butagobo_jaduz.pdfIn PDF document text
    • http://files.amypurcellart.net/uploads/1/3/1/8/131856602/pulekanuxaxosiw.pdfIn PDF document text
    • http://files.mosaicartsfestival.com/uploads/1/3/2/6/132683080/dunitotabepaxu-kaguxibidu-lapusexavemu.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/1/0428/9835/8432/files/mejamuzeditika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/91436341045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/46049890673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/lolesafilis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/taratunujasibisexumavuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/iframe_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/jenga_drinking_game_diy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/14714010712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/51532770374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/administracion_de_recursos_humanos_idalberto_chiavenato_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/30967489802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/9066849563.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_off000221ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221CE 5588 bytes
SHA-256: 6487e930ac294f94d420bc42081130d471dc3059206ca93aab1e4134118af75d
font_01_sfnt_off00023502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23502 16148 bytes
SHA-256: 99e307d42e225766020795cb514b3f920e23e09547ff86adf530f93e1fa3d813

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