Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1430716b9e71e4…

MALICIOUS

PDF

41.5 KB Created: 2020-08-04 18:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e5e19da5c673b7a51567187d073c445 SHA-1: 12d5145490e7234e0109a26fb4c500f871048c25 SHA-256: 5a1430716b9e71e460d38bb242c820c6134d31cc461ab0376a9e919e705a9912
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate study material, but the primary link redirects to a known malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's purpose is to lure users to a potentially harmful site. No scripts were extracted, limiting the analysis of further payload execution.

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.ru/pify?keyword=important+questions+for+class+12+hsc+biology+chapter+wise+pdf In PDF document text
    • http://files.atlanticintegrated.com/uploads/1/3/1/4/131454549/3525533.pdfIn PDF document text
    • http://files.ourgreattravelblog.org/uploads/1/3/2/8/132814147/pokowalotitadajeg.pdfIn PDF document text
    • http://buwajit.roamingbrit.com/uploads/1/3/1/4/131437423/8674367.pdfIn PDF document text
    • http://files.optimalwellnesslab.com/uploads/1/3/0/7/130740586/fawimilanejizet_pofomopirizikil_zepodejanefuzer.pdfIn PDF document text
    • http://files.stmarkski.com/uploads/1/3/0/7/130740429/kizumimitizuxewibi.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/1/0432/8102/3140/files/nokelum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/discord_delete_all_messages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/19084186021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/24522590519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/bumajefawujug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/buwuvetigiruvajutime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/gezatolas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/dedajomawibogok.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 3

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_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 6148 bytes
SHA-256: b9e33a12403109435f026061512cde917e3f6e805e952ca57717813c411ae23e
font_01_sfnt_off000075b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B7 10216 bytes
SHA-256: 10f9763c321ca23dd5a38bd8989ed41acb3a62c19bcf2a79a347f82ebf54c190

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