Malicious PDF — malware analysis report

Static analysis result for SHA-256 28345def1ae3c567…

MALICIOUS

PDF

42.0 KB Created: 2020-07-30 16:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 711f4955d358a9727a17c2ad9d8bc08a SHA-1: 62531fbce4e8b1dd59e04a2c4a494fa6cdaa9cc6 SHA-256: 28345def1ae3c5676d63ee05f7c9e3dd3d743d252b320346cabcb99f908bd87f
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to 'pgimer bsc nursing entrance exam previous year question papers pdf'. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or SEO manipulation.

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.com/pify?keyword=pgimer+bsc+nursing+entrance+exam+previous+year+question+papers+pdf In PDF document text
    • http://files.yeagerimages.net/uploads/1/3/1/4/131453350/d7ac32fb874439.pdfIn PDF document text
    • http://files.hannahfairchild.com/uploads/1/3/2/7/132740193/pejajusemudu_zedeb_xepodoropokavi.pdfIn PDF document text
    • http://files.seekanddestroy.info/uploads/1/3/2/6/132682585/dovonulun.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/1/0428/3547/6636/files/52323912669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/kutopinefoxoxanako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/24980437721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/59906830217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/bejafizagijozokiraje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/jesunus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/lumawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/jituweboripepolif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/19530312618.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_off00006466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 5820 bytes
SHA-256: ef9154bfa67f7b0b94b750a1cae35ede3768d4475d13a0a0d67ea6140dc8e0bb
font_01_sfnt_off00007817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 10008 bytes
SHA-256: e9c36be0faee12a3e7da78153cb39ff45824abf46025c128f804f4d15b740469

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