Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71bbd5774398ab0…

MALICIOUS

PDF

330.1 KB Created: 2020-09-02 17:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29967e7f48f2d092231b563090b8335b SHA-1: c430250036f01b13522f9d599ec710e984aa5bd7 SHA-256: a71bbd5774398ab005ffa2fb6420821fb3508470d5b796bf685fa2c1d48eb51b
182 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1204.001 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is associated with distributing malware. The document also exhibits characteristics of a lure, including a visual download button and instructions to use remote support tools, suggesting an attempt to trick the user into installing or running malicious software. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/wix?keyword=autodesk+autocad+civil+3d+2013+free In 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/1/0429/3872/8611/files/58452295657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/87134651908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/40492240281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/23969990246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/9421820622.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_60f8c5c0c5174378b206cd19527f1baf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/314c35_c065c6829ed542d791eaa3c54d801276.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4542d9_2965373d1bcb494eb2c5f880e0aba58f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3f4b99_7bedb329a65b4c7fa2b871bf079b58ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/12daa7_07bc7a9d14324cd0838cbdca626462ec.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/078c79_fd77f054f9d44b4685dec5dcb83bfb0d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004bb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB25 5616 bytes
SHA-256: aa9cbc4afaf6eef612732daca3b277fdf1e988c61f96118838b0f8936dd1964f
font_01_sfnt_off0004ce63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE63 17420 bytes
SHA-256: bc7771497daa8e3f1940e90ce05f6d29d794dc687067626dbde4248a9ce74248
font_02_sfnt_off00050419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50419 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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