Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27bd9ad321c9370…

MALICIOUS

PDF

53.5 KB Created: 2020-08-06 04:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cdddd74e453c2fc076669eed94528549 SHA-1: 97e2e5c2440f8a97b0818b1ee9a92fa8c72d8aac SHA-256: c27bd9ad321c9370f19d685b346d3072545873c4fc2ce06b865bb38bb2eb6275
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link and a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Biostatistics journal pdf' and a URL that matches the redirector heuristic. The presence of a link farm with numerous PDF links further supports the lure tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=biostatistics+journal+pdf In PDF document text
    • http://nimibu.dahianatorres.com/uploads/1/3/1/4/131454065/5069817.pdfIn PDF document text
    • http://files.lizzysitterdesigns.com/uploads/1/3/0/8/130814669/4614401.pdfIn PDF document text
    • http://files.acuteanglewritez.com/uploads/1/3/1/8/131871621/8314778.pdfIn PDF document text
    • http://lanefa.guavachocolates.com/uploads/1/3/0/8/130874457/c071728.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/1/0438/1730/4226/files/xokuwifubavavanosijewixej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/jamaica_inn_daphne_du_maurier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/22395514107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6626/7550/files/craftsman_snow_plow_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/limufobewoferudoraromijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/16964534625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/26444323276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/80312357939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/kuvewasabobubez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/nexule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/20500263240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/dufek.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 3

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_off000091fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FB 5272 bytes
SHA-256: 84530c4b2d5851d11a59561413d0eb6756a76645af814fb5a7d5e8f7bc65a4f0
font_01_sfnt_off0000a3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FC 10812 bytes
SHA-256: 0b6b68e83b291bc33ba6a703857a647108ff83a885576625a2042918919ca636

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