Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16fa57eed1625e4…

MALICIOUS

PDF

163.1 KB Created: 2020-08-18 19:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec6b19f8a00e1e0a961ffa46ae6a750c SHA-1: 5d565555a1cc05a37b70a95e347f4fd51aa3f081 SHA-256: a16fa57eed1625e402d01e0e71cd6ad59d4a4518ccb467d49b0b800b35980bde
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.com/pify?keyword=aspiration+pneumonia+australian+guidelines' is the primary indicator of malicious activity. The document body, though heavily obfuscated, contains fragments that appear to be related to the URL's keyword, suggesting a lure. No scripts were extracted, limiting further analysis of execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=aspiration+pneumonia+australian+guidelines In PDF document text
    • http://files.northcountryblog.com/uploads/1/3/1/8/131858540/vepelavo.pdfIn PDF document text
    • http://vusula.centennialxc.com/uploads/1/3/1/8/131872225/pepaxopamu.pdfIn PDF document text
    • http://pefereri.qudotphotonics.com/uploads/1/3/2/8/132816066/lafulenozopizat.pdfIn PDF document text
    • http://files.guafoislandscience.com/uploads/1/3/0/9/130969600/zugule.pdfIn PDF document text
    • http://xixarega.drjglisson.com/uploads/1/3/1/6/131606349/4715955.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/1/0432/5274/4356/files/97934686005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/60268098528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4421/files/zach_eflin_fangraphs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/34990783295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/xamonimawebojuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8806/7225/files/61242329817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/75605281132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/hematology_book_free_download.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_off000228dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228DC 5268 bytes
SHA-256: fe374be1e7faba0f54532cac9cd4321f11577e6f86830c7557ac46addd79dfed
font_01_sfnt_off00023aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23AA5 14952 bytes
SHA-256: a3eecfa2c1dff515b8d5633095713f2b0b145dbc24c3c9364eb6f84e68709f44
font_02_sfnt_off0002690d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2690D 16152 bytes
SHA-256: 107dd7461bad0ee7f69ec232d7edbfa51533cbe03462e0930b0bd999c9024e27

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