Malicious PDF — malware analysis report

Static analysis result for SHA-256 5081a3460b1cda0c…

MALICIOUS

PDF

36.3 KB Created: 2020-08-08 21:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0211a65953ccf8a3fc2b8169393b1c71 SHA-1: bdd859400c37c936b90c197b8caa0a0091844591 SHA-256: 5081a3460b1cda0c18bd52184d142d2937c05a5057cd42e03f1f623924127a6c
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for a textbook, with the primary link redirecting to known malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a lure to a malicious redirector. No scripts were extracted, limiting the analysis of direct payload execution.

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=carranza+s+clinical+periodontology+10th+edition+pdf In PDF document text
    • http://files.jesselgallery.com/uploads/1/3/0/7/130776082/famuwunazivaso_suvutuwu_noxaxodujipuroz_ferotog.pdfIn PDF document text
    • http://files.seniorcenterwalkercounty.com/uploads/1/3/1/3/131380600/kusixisufidi.pdfIn PDF document text
    • http://simolagu.gooseberrycakeco.com.au/uploads/1/3/0/8/130814297/tevafukizisosowe.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/1/0437/0428/7383/files/empirical_formula_worksheet_2_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/digil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/zipujuruliluxetafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9716/0866/files/60869330212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1991/7720/files/zuruwugifubivuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/83957670117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/nutapatatinegojatalaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/58260591889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/4261759399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1666/4734/files/84316977845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/drivers_license_renewal_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/42757988207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/catholic_liturgical_vestments.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 1

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_off00004e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E71 5668 bytes
SHA-256: 9f324c8a072cb0696cbe0bd8b3e3cfc46ea7ea9fec225893ce93f5280b6c8fb3
font_01_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 10072 bytes
SHA-256: 94c4d6c940f13eac578a7ebf68138e6bb2b41cc606991e7f4620aaa1cdb271b3

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