Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4237f5fe5dff85…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 01:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97348e92c3b7d82a18588fc93586a9f7 SHA-1: e3d46842dd42381e086169ac18e9895133cab627 SHA-256: 2f4237f5fe5dff85ad7f5060bd7283742fee3972a0e90ae5eba6066f619c1f58
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL identified is https://ttraff.com/wb?keyword=hemorragia%20digestiva%20alta%20pdf%202016. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure victims with seemingly relevant medical information. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=hemorragia%20digestiva%20alta%20pdf%202016 In PDF document text
    • http://files.westhighlandherbal.com/uploads/1/3/1/3/131382274/nasasafej.pdfIn PDF document text
    • http://files.matrix-leadership.com/uploads/1/3/0/9/130969938/6523924.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/1/0430/9535/9641/files/50341063462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/wafebemumojodoxagavukovob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/tahapan_sintesis_protein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/garujagefugilofaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/home_alone_main_theme_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/sniper_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0574/1989/files/nanostructures_for_antimicrobial_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8873/1546/files/kuramibasekuvorame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/miguxulenasisomifoxanigen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/numl_online_admission_form_2018.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 1

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_off00006413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6413 5864 bytes
SHA-256: 36c6685627b2550074ebc442ad7e413342c7ad283e79c5c6a97b3a17b397e7a8
font_01_sfnt_off000077ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FF 11968 bytes
SHA-256: abe1c42da4bd0c8794e2e734f1cdef969c64b3ca3b857a323e8726c6469dab53

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