Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f84d8515a3a909…

MALICIOUS

PDF

46.4 KB Created: 2020-08-23 23:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4a644a4db2600ce8a95affe64c02e41 SHA-1: 28d800ee88bdcc0d1b119c9018b1bb751436f2bf SHA-256: 19f84d8515a3a909d11f5b238747ae861bedc0e32ec985a7a162dc6456da4a28
134 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'ttraff.cc', a known malicious redirector. The document's content, disguised as a worksheet answer key, is a common lure for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=cpctc+worksheet+answers+solve+for+the+variable In PDF document text
    • http://zasadapum.holdenshouseco.com/uploads/1/3/0/7/130775519/3a78a7dedf9006b.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/1/0431/4418/3970/files/80811598749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/tonewijuxalulabejelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/bizowalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/42340115016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/factoring_quadratics_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/mibigenupufonenotekesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/suledigiledogunisomozi.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 4

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_off00005922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5922 5364 bytes
SHA-256: bc830781c8c81b7ba84ab57c05cc51ff9f85345af6f9a4f1c7bc9bb2bcfcc8e2
font_01_sfnt_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 13792 bytes
SHA-256: 51dea5b7e172afc29e7b3f36ca408ecce33a0ab56fb0e049a4ae26e0c3354cb4
font_02_sfnt_off0000974d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x974D 16168 bytes
SHA-256: d05f37f1530d5f93420ec1d1fef03be40ff404ab4da44f5daae16fd0829d120f

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