Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d58a511a16d0190…

MALICIOUS

PDF

34.4 KB Created: 2020-08-11 12:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: acf535d761e29a3eeb95abdfd10037c0 SHA-1: 54fbaf355c6661c2d549ad34308b87a8fcb4ebe8 SHA-256: 8d58a511a16d019086dcd853a0da45f9315c73562a5a114cd5a9e4bde476e295
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including one that redirects to known malicious infrastructure. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=alan+turing+the+enigma+pdf+free+download', suggesting a lure to download a PDF, which then leads to a malicious redirector. The presence of numerous other PDF links further supports the SEO link farm heuristic.

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.cc/pify?keyword=alan+turing+the+enigma+pdf+free+download In PDF document text
    • http://files.myqse.net/uploads/1/3/1/6/131637043/kozajosematewak.pdfIn PDF document text
    • http://files.richardsnyder.net/uploads/1/3/2/8/132815298/9319644.pdfIn PDF document text
    • http://files.alexandrakulick.com/uploads/1/3/2/6/132681901/sovokixuropiwu-fibanimutoki.pdfIn PDF document text
    • http://files.keyspeechtherapy.com/uploads/1/3/1/3/131378990/kiradobud_modawatibad.pdfIn PDF document text
    • http://files.mdrewery.co.uk/uploads/1/3/2/6/132696465/gosaz.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/1/0432/4291/3955/files/95508003242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/mendelssohn_wedding_march_sheet_music_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/application_form_for_loan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/5671547118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/amblyomma_hebraeum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/81732025616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/devovubedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/69875203488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/76858035911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/mukutoruxipabusorigar.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 7

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_off000048fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48FE 5360 bytes
SHA-256: 2ff1ff9c9c02fdc198de996b500dfce34ebe966941d042df83c7d453c4f05be9
font_01_sfnt_off00005b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1B 9768 bytes
SHA-256: 634432371e32031d5fe3c51ee96d35ff231825835e404c110a38da4517e3fefa

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