Malicious PDF — malware analysis report

Static analysis result for SHA-256 6277023a72b23a49…

MALICIOUS

PDF

47.7 KB Created: 2020-07-30 03:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5efeec685eea4c9789ad473fbced592 SHA-1: e491f99717fb15bd03aa69f815dbdd18785007e7 SHA-256: 6277023a72b23a49e9f85945c389962b5884edad2de30272b86d033512c2ab03
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=baixa+idade+media+resumo+pdf. The document body, though heavily obfuscated, contains text that appears to be a lure for a document summary. The presence of embedded URLs and the ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

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=baixa+idade+media+resumo+pdf In PDF document text
    • http://files.teach-me-in-autism.com/uploads/1/3/2/6/132682681/wepufo.pdfIn PDF document text
    • http://files.lavarthomas.com/uploads/1/3/0/7/130740213/96f5d44e.pdfIn PDF document text
    • http://files.crystalclearcommunications.co.uk/uploads/1/3/0/7/130740202/38b574ef0e7.pdfIn PDF document text
    • http://files.wattssashiko.com/uploads/1/3/0/8/130874493/2505733.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/1/0436/3767/0041/files/77012466482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/winubivapepojutizevet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5658/5114/files/kukar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0426/3580/files/nugegapivazoregizubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/18198457690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/sugademasenomarituxefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7260/1756/files/56793044047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1297/0903/files/30821029681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/53606897772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/36866196574.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_off0000790b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 4968 bytes
SHA-256: dd4fb2f0993fb67ed27cfdac7f5cbbe22fb13a006a32adef1f5ce4cdc8a1e301
font_01_sfnt_off000089f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F5 12688 bytes
SHA-256: 4ba962e845152c3b87d7c29e17ed23f9d9995772482218ba9ceda6af904196cd

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