Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c51a4d1f3556120…

MALICIOUS

PDF

97.6 KB Created: 2020-07-27 15:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50eab05a4201312c14f65b839f4bddf5 SHA-1: b222a561098995f263cd1b5612fee81ee187e7e3 SHA-256: 5c51a4d1f35561207118a3c56d331e1c48dbf149a06ddf1ebdee08e76a28de88
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to the URL https://ttraff.ru/pify?keyword=perioperative+antiplatelet+therapy+guidelines. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded links and the nature of the heuristics suggest an attempt to redirect users to malicious infrastructure, likely for phishing or to download further malware.

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.ru/pify?keyword=perioperative+antiplatelet+therapy+guidelines In PDF document text
    • http://files.jenniferbetteridgephotography.com/uploads/1/3/0/9/130969429/9893254.pdfIn PDF document text
    • http://files.motivationbymaia.com/uploads/1/3/2/6/132695405/31d9e66e71c1.pdfIn PDF document text
    • http://files.rollepodiatry.co.uk/uploads/1/3/1/6/131637631/kewudijotu_pagerozejaxuwes.pdfIn PDF document text
    • http://files.jpactm.org/uploads/1/3/0/7/130739558/956628.pdfIn PDF document text
    • http://files.kosherhire.com/uploads/1/3/0/7/130776500/2f8da9ebdf.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/1/0428/2207/4534/files/tolugus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/78389886386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/94553478760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/meperosug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/83868594776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/guboxidimide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/dogamesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5224/3861/files/nizadudojudunekaxatepob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/58853156977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/zololufofafoginipegifaba.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_off000125e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E5 5264 bytes
SHA-256: c21d501f2693b58ea6695b3c814b279063a05d86a4077d5f8ee821e19bfd4b0a
font_01_sfnt_off000137c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C7 13468 bytes
SHA-256: 2d08008f46601b15eb0194bc4dd4dc16fb7e67a110a173c5a9cdc34e154b9c9d
font_02_sfnt_off00016304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16304 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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