Malicious PDF — malware analysis report

Static analysis result for SHA-256 545d8b4b2ad73822…

MALICIOUS

PDF

48.6 KB Created: 2020-08-09 12:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10bf0ec21f808971dad84d2dfb9035c3 SHA-1: e9f029eb3d627608e20bb3e3f934c264ca8ca715 SHA-256: 545d8b4b2ad738220e832f2c5a984f6645372e899b443eb63adf12a672944eb4
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a prominent call-to-action button and a link to a redirector, indicating a social engineering lure to trick users into downloading malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirector leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of links are present, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the document body contains the malicious redirect URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=pdf+booklet+creator+free+download In PDF document text
    • http://files.willowslifestyle.net/uploads/1/3/2/7/132740584/figosojoxo-pitujogutak-nikitozi-paveso.pdfIn PDF document text
    • http://mizirib.grinnellcecbucketcourses.org/uploads/1/3/1/1/131163590/1500684.pdfIn PDF document text
    • http://files.victorianfashionsociety.com/uploads/1/3/1/1/131164456/kovewuzububixuvaf.pdfIn PDF document text
    • http://files.lfsespagnol.com/uploads/1/3/1/3/131398076/7074a416.pdfIn PDF document text
    • http://files.megan-livingston.com/uploads/1/3/1/4/131437474/65d4ab.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/1/0431/3110/9538/files/153731434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/96350311969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/nasarobugopoputubowofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/59064397950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/lipivezututop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/xokamupezemeditev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/25432554352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0535/3889/files/57874758696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/daft_punk_discography_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/wusinewowubiliboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/87495752918.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 5132 bytes
SHA-256: 17c366f5768f7cf2956273e8eeabd3f1d67dcb65435386f470c8ca04b5559340
font_01_sfnt_off0000929d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929D 10172 bytes
SHA-256: a1ecbc76832745eca9bf636741fec7d51bc97fcfce3b81c91ff4d989c2416b0d