Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e3c65b6aeb90eb…

MALICIOUS

PDF

44.3 KB Created: 2020-08-04 23:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 281011b0093b3c793f7611991eb81395 SHA-1: 9e04de2636c6443d39aa2bb8de4fbe332f7d8299 SHA-256: 05e3c65b6aeb90eb286f5185e7cb297d802298a18a896e8858ae78bd5d1dd32e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness.

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=psicologia+que+estudia+pdf In PDF document text
    • http://files.prosurfschoolhawaii.com/uploads/1/3/2/8/132814768/pedememanalipule.pdfIn PDF document text
    • http://files.theturkishdeli.com/uploads/1/3/2/7/132740193/bubawulofu.pdfIn PDF document text
    • http://files.chrishanxoxo.com/uploads/1/3/0/8/130874431/9640767.pdfIn PDF document text
    • http://files.wingstowar.info/uploads/1/3/1/4/131483830/gamore.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/1/0427/9740/0223/files/ledojifobitovumujori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/larenevovug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/692644568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/nolegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/puwejonapefokexetem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/33095865542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8742/9781/files/bank_cashier_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/bimivufatasemopad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/zebowafagilakesolebifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9561/files/big_whiskey_menu.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_off00006d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8E 5352 bytes
SHA-256: 5e2eea49beec38c03d0943653fe0e828b589bee91c77048fbe887607a3f1336f
font_01_sfnt_off00007fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD4 10760 bytes
SHA-256: 327f33d3039118d564d33b71608310c7f9dab5973523b211da0a2cd148c30215

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