Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d0b62ce02581af…

MALICIOUS

PDF

37.6 KB Created: 2020-08-09 01:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 833c6d08c04aadeba3afccdac89fcbf9 SHA-1: b0bd969c2c4eeee11d99fc4eebb2edba42b81645 SHA-256: 50d0b62ce02581af9b3643a86dad30020654ca08412eb7e1434b9c650b9f1ead
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free alphabet tracing worksheets for preschoolers pdf' and includes the malicious URL, suggesting a lure to disguise malicious activity. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious intent and the nature of the link farm.

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=free+alphabet+tracing+worksheets+for+preschoolers+pdf In PDF document text
    • http://files.etlrarlibrary.com/uploads/1/3/1/3/131383541/e2ce923b.pdfIn PDF document text
    • http://sepasuze.owlridgetaxidermy.com/uploads/1/3/1/6/131606289/2518357.pdfIn PDF document text
    • http://files.millennial-media.net/uploads/1/3/0/7/130776725/luforugag_wifonexodal_vuzakaluworexe_difel.pdfIn PDF document text
    • http://zagiduv.amadeus-athens.com/uploads/1/3/0/7/130775918/2542663.pdfIn PDF document text
    • http://files.claddaghirishdance.com/uploads/1/3/1/6/131636692/pugakalag.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/1/0432/8259/6004/files/29621629555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/kenegefokigidivovelatin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/73492797187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5046/6464/files/67701772049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/gotirobenoxorokefupase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/54162634329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/53963169347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/75464027011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/bufamemibox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8725/5960/files/well_behaved_wave_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/majegugomurujus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/bisas.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 2

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_off0000536c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x536C 5668 bytes
SHA-256: bbf02efe299401ec7827702832e71cb2b039ef010a0029f96716d6dcb721af60
font_01_sfnt_off000066b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B4 10044 bytes
SHA-256: bd09dc64fa93f0fdb5d47f0c8165e3773ee3351eb621748c3fd14c154b176bde

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