Malicious PDF — malware analysis report

Static analysis result for SHA-256 518b9999d4be088c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-07 00:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f45a8aeed8d6fdd9c9a7fad262fa5b42 SHA-1: a28624f932431cc5760d9eea8652fa6e56795375 SHA-256: 518b9999d4be088c0625f7dc983b89628464de78f456b19321e2b950bec5f15e
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, with one specifically identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=accountant+duties+and+responsibilities+pdf In PDF document text
    • http://files.pellegrini.store/uploads/1/3/2/6/132695190/kateje_gupewinuri.pdfIn PDF document text
    • http://files.alabasterhousechurch.com/uploads/1/3/1/6/131637016/garokamaw_sozupifolitojo_puzevaxesusexip_witidug.pdfIn PDF document text
    • http://files.thelifeatthehelm.com/uploads/1/3/1/4/131454770/6916031.pdfIn PDF document text
    • http://files.ianmichaelgood.com/uploads/1/3/1/4/131483955/cf33d5b8.pdfIn PDF document text
    • http://files.rfhallalumni.com/uploads/1/3/1/6/131636644/99b88e7baf.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/1/0440/6181/9045/files/4544465479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/winob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/pentair_pool_filter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/56564481018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/alice_miller_dramat_udanego_dziecka_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/detorubokuwupitikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6220/files/erosguide_san_diego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2809/3856/files/boribakifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/88383843613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/senadeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/7101750653.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_off00007364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7364 5276 bytes
SHA-256: c5fbedbbeefb07866fb9d46b209ea73bba72a7df9e8aad13063952e5f5a7a315
font_01_sfnt_off00008560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 10556 bytes
SHA-256: f0fda26b757477d5d1ec8b5824803771f8a1f926faed7ccf71840be0db5c0fb8

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