Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d91f87eb2e1d5d7…

MALICIOUS

PDF

36.3 KB Created: 2020-08-05 06:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a27e407323c42bfbc724a4a88a5d3e51 SHA-1: 5acb5b235043e78b4a8a799534135dbc5784fa6b SHA-256: 6d91f87eb2e1d5d70f84a4f6b2eda96a7b3421d3a70c0bec1ba1f7008d480cbc
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, pointing to a phishing or malware distribution attempt. The embedded URL 'https://ttraff.ru/pify?keyword=lj+clancy+aerodynamics+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=lj+clancy+aerodynamics+pdf In PDF document text
    • http://files.pytharealtygroup.com/uploads/1/3/0/7/130740078/3596edb9.pdfIn PDF document text
    • http://files.opvrs.com/uploads/1/3/1/3/131398224/8464073.pdfIn PDF document text
    • http://files.sylvialowery.com/uploads/1/3/1/0/131070367/mugubadox-megofuxuv-regazuvo-jabejesunosij.pdfIn PDF document text
    • http://files.gabriellemoulding.com/uploads/1/3/0/7/130776483/8738025.pdfIn PDF document text
    • http://files.artofinvitation.org/uploads/1/3/0/8/130814017/xokopezopakiwav.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/1/0431/4575/6821/files/11401128482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/sesotavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4613/3157/files/maweloxofexewunudetiwof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/rubebototazud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/naxunumeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/parita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/84299788588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/wowirokejipuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/legefumoletanigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/6th_grade_math_word_problems_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/domegexavemiratesex.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 5

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_off00004ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF0 5420 bytes
SHA-256: 347cc1dfaeab0eb931c62ca6fb0d22e6cdf80b2d9f63c320a95d5952baa68974
font_01_sfnt_off0000615b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 10324 bytes
SHA-256: 4b283e2bfd60f6f2a585f60c922812348643ee541f283945bfd4849a04541973

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