Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f36fcbf8aaee82d…

MALICIOUS

PDF

51.7 KB Created: 2020-07-31 13:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63f3e3b2759453c94cb57bb3fd3db4d2 SHA-1: 6caf5e468d3c3f5e585a23f1ecb6179bbd1c9ede SHA-256: 5f36fcbf8aaee82d91b2cf6e05a1d405f369c494810e02cd7f52ffd597fc265e
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to the URL 'https://ttraff.com/pify?keyword=ativos+financeiros+pdf'. The document body, though heavily obfuscated, contains text suggesting a financial theme, likely a lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=ativos+financeiros+pdf In PDF document text
    • http://files.ontheedgeofreason.com/uploads/1/3/1/4/131408170/521b71c0418ccf5.pdfIn PDF document text
    • http://files.apperley-deerhurst.co.uk/uploads/1/3/2/6/132680827/fabonaxatafi_zajaxe_pejap.pdfIn PDF document text
    • http://files.thompsonphoto.co.uk/uploads/1/3/0/8/130814329/9681255.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/1/0435/3510/6200/files/ligukeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/20865667669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/26756839859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/95341583479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5743/1199/files/87491138740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/fifugeripufamevuzix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/sisek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/kujoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/jilolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/fefekuturetasimigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/36532376446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/lefejadolutikajipalas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/muvujakoxe.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_off00008bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD5 4956 bytes
SHA-256: eecb8de116550395d31c87c6beada9eba11eb1e1b15720bff1d69c66cfa9f35f
font_01_sfnt_off00009cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB4 11272 bytes
SHA-256: f1ca860a2d17d8bf9b624e124329b96658929ee6022fcefe27506fc12cee1936

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