Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2a27ec0da7d12d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-04 20:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ff61bfa702c8d1ecd4ef35af754810e SHA-1: 4208cc117b46b0cdb44d36b315a1965a24a56bbe SHA-256: 4d2a27ec0da7d12d26504c42f942a00a8900c6a0714f9aa011d9c06cadfe2910
234 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body, though corrupted, contains text suggesting a lure to install a viewer or update, which is a common tactic for malware delivery. The primary malicious URL identified is https://ttraff.cc/pify?keyword=font+weight+bold+not+working+in+pdf, which redirects to other PDF files hosted on various domains.

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.
  • 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
  • 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=font+weight+bold+not+working+in+pdf In PDF document text
    • http://files.halfpintaussies.com/uploads/1/3/0/7/130739131/f9eb0b7c6cd6b.pdfIn PDF document text
    • http://files.ahespta.org/uploads/1/3/0/8/130813427/9969547.pdfIn PDF document text
    • http://files.myswimvillage.com/uploads/1/3/1/1/131164205/8091349.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/1/0440/3019/7925/files/ms_comfort_optical_mouse_3000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/vermilion_parish_jail_inmates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/xagezikofokoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/78422375507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/pilowiduzujedofuxazude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/modozevezijegixixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/54020249455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/39701413385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/lowes_rapid_city_sd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/79017914337.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_off00005ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE1 5168 bytes
SHA-256: 0e44bfdd9f18db15686c6117c903b3e453274d0f59acbea9c0c307806c2abae2
font_01_sfnt_off00006c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C82 14164 bytes
SHA-256: edb19fd90830e7515dbbccbc51d1cef5190e5cf0d659632ce814ce810fa721af

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