Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3994090a9c50bfe…

MALICIOUS

PDF

46.5 KB Created: 2020-08-08 12:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5608d200e37e94a829e3e74784951e65 SHA-1: 2fd6efdc8c9efdfabd34b37267f6a327215cef9f SHA-256: c3994090a9c50bfee168089184bc3c7e1b6f2ec75399fddb9fe6c5460011a4b5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. One of the embedded URLs, https://ttraff.cc/pify?keyword=laboratory+safety+definition+pdf, is flagged as a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a container for the malicious links.

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=laboratory+safety+definition+pdf In PDF document text
    • http://zebasat.paradisecoastreport.com/uploads/1/3/0/8/130815017/2207271.pdfIn PDF document text
    • http://files.summitlakewi.org/uploads/1/3/1/0/131071043/moputexokuwilosukaz.pdfIn PDF document text
    • http://files.belizelionfish.org/uploads/1/3/2/6/132681359/toxapuzapak-firigaxodi-pisenavakewiv-wevomadipitesim.pdfIn PDF document text
    • http://mumenu.ancastersmallfrypreschool.com/uploads/1/3/1/4/131438464/405ae.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/1/0435/8671/5805/files/tirubimosepufowalebibise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/56362033137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/mewude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/jojekalanebujesibili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/nepetitewawamoweru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/9417561349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/medical_biochemistry_mcqs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/19891373928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58580374151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruxejuvekega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9463/files/10938135801.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 5

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_off00007995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 5188 bytes
SHA-256: f5cfddd7ecd0963706dcdd9a708b8aabaf9379517de2cfd95962a45c1b8d5770
font_01_sfnt_off00008b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4C 9856 bytes
SHA-256: e6741398f0acca4a8b4f9ec8c0a6c1561146f50e34b84bd1d0f780295c9b62da

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