Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fee71218547d443…

MALICIOUS

PDF

46.3 KB Created: 2020-08-01 11:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d20f10e9dc6525e32e6dbeff9eaee1f SHA-1: 70bccb90035a13ac8650468fee6f50a0e373e404 SHA-256: 4fee71218547d443bf40bc93be0a06fba707e619c21c5f9d42bfb904ea77f630
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector. The document body is heavily obfuscated and contains a mix of readable text and what appears to be encoded data, including the malicious URL. The presence of a large number of external links suggests an attempt to manipulate search engine results or distribute further malicious content.

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=ruby+date+format In PDF document text
    • http://files.sweetstreet.info/uploads/1/3/1/3/131398100/4921266.pdfIn PDF document text
    • http://files.sheilahanson.ca/uploads/1/3/0/9/130969700/femikivozusuwe-dejore.pdfIn PDF document text
    • http://files.fawntownship.com/uploads/1/3/1/4/131437756/25384.pdfIn PDF document text
    • http://files.delytefulpapillons.com/uploads/1/3/1/4/131453943/tonuduj.pdfIn PDF document text
    • http://files.earthspiritpress.com/uploads/1/3/1/6/131606025/jiwivog.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/1/0433/3849/8206/files/57609128056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/42818468030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/46191936245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/bumotaxatibiwosipeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/92890669220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/lolelirizebox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/nilaguwakurewitavixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/lixakilajenanaguge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/femuvivudiwavofozisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/tenebuxuxuzopugozitab.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 7

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_off00006972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6972 5092 bytes
SHA-256: 61fd0cd5505d8c7aeb699d67b0d4d963e05fd38eb5e88887b6fc166084cf3a6e
font_01_sfnt_off00007aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 15456 bytes
SHA-256: c8a0ff185c41d73c755f613f831a648009a1725d3a22461a28c82122527982a3

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