Malicious PDF — malware analysis report

Static analysis result for SHA-256 239fc3fe1d17ad7b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-10 08:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 593239f6c6cc0599328a2f33b66d732e SHA-1: 265cb23cae7671911ddbe3a91d72d125e682b5f3 SHA-256: 239fc3fe1d17ad7b63565395922dd37b942fc3b4d0c763cec343449342d7d87c
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=clinical+hematology+atlas+rodak+pdf. The document body, though heavily obfuscated, contains references to the same URL and keywords suggesting a lure for downloading a specific PDF. The presence of numerous external links, as noted by PDF_SEO_LINK_FARM, further supports a campaign aimed at driving traffic to potentially malicious sites.

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=clinical+hematology+atlas+rodak+pdf In PDF document text
    • http://files.mullermgt.com/uploads/1/3/1/8/131856430/wunumipalesibapipun.pdfIn PDF document text
    • http://files.secondchancedogrescueofiowa.com/uploads/1/3/1/0/131069950/nafaxasati.pdfIn PDF document text
    • http://files.myflexbrace.com/uploads/1/3/2/6/132681836/jadofomekox_nobalofe_gavadudakepix_kapuve.pdfIn PDF document text
    • http://judug.johnnguy.com/uploads/1/3/1/1/131163898/451570.pdfIn PDF document text
    • http://zanova.brassattack.com/uploads/1/3/1/3/131383664/tivufigenoxij-nuregamipako.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/1/0430/4211/1650/files/44674305280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/7283431598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/professional_cooking_8th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5816/6949/files/ensayo_de_escepticismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/al_arabiyyah_bayna_yadayk_english_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/73522420548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2347/3568/files/99201726094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/suzofarumiwobegabesorekiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/neworusupapevusoxuzogoxik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/minecraft_city_rp_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/gomalaxumaxakexogazaxuw.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 4

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_off00006b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B13 5640 bytes
SHA-256: 90cf6c88933c9ddb1d92f4eec47a8287e254de7973434d9d15684a138e83ce48
font_01_sfnt_off00007e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 13056 bytes
SHA-256: 1310ca09dd3004b5a07d3c783effb64600b4e2e39b071d97b66ef31152d54e0b

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