Malicious PDF — malware analysis report

Static analysis result for SHA-256 6685554bf0308cae…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 01:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe27bd64f97dcc8275b72de64dae9977 SHA-1: 8e729eb9c955aa23e9bcce51a8269916a7566dc8 SHA-256: 6685554bf0308cae03723a1aa89c8d22a4905284fb8dffbbfedbefc1e3ed8e57
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a free book download. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the heuristic firings suggest the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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=administra%25C3%25A7%25C3%25A3o+hospitalar+livro+pdf In PDF document text
    • http://files.lustpunch.com/uploads/1/3/1/0/131069859/6354156.pdfIn PDF document text
    • http://files.womenssecretonline.com/uploads/1/3/0/7/130775529/mokuzepip.pdfIn PDF document text
    • http://files.workwithstandout.com/uploads/1/3/1/6/131637385/vilirizafomoxet-gokurufodawukag.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/1/0437/5209/5898/files/gebodal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/77598002254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/fafoduzupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/rorubidikezikebafap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/sedonatadudorezomanetevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/rental_payment_receipt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/53803002079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/93804239322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/5684300442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/vetuvawibitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/murasevozukabalefipojapez.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_off00005eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 5832 bytes
SHA-256: 4ec1d12ce3613c3a95fb75ae2785b2bcda1191361bb3072640bc8d6dfac011f1
font_01_sfnt_off000071d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 12704 bytes
SHA-256: 7a8f67737e6b7f35d79810eeca57ce65a098fb2f01c6edb1d2a9f7128d726ad6

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