Malicious PDF — malware analysis report

Static analysis result for SHA-256 24729fa73308bd9d…

MALICIOUS

PDF

48.6 KB Created: 2020-08-24 07:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19d8838e216a2f5cbba02c3828809ea5 SHA-1: 8b19fb5cbdaf69d9aa932914b3a536006684e01b SHA-256: 24729fa73308bd9d5756d40ead886ffb250b9cf07c88b2a3d1571b6fc621d48e
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a redirector service, which in turn points to a malicious URL. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'chemistry regents august 2017 answers jmap'. The presence of numerous external links, many hosted on Shopify, indicates a link farm strategy to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=chemistry+regents+august+2017+answers+jmap In PDF document text
    • http://vutuba.royalmarineser.com/uploads/1/3/1/8/131871787/zamazarasa.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/1/0433/8437/3406/files/risibogazeruxosoduxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/85520878913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/deloitte_internal_audit_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/table_border_not_showing_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7488/5534/files/wixovupobesazevavadudinof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/automatic_refresher_firefox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/apfelwein_selber_machen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/73529679184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/43553422697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/73924173027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/family_budget_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6049/3465/files/idsa_mrsa_guidelines_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/panasonic_phone_manual_kx-_tgea20.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 8

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_off00007123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7123 5780 bytes
SHA-256: d3b6b645ea50ef3dec5531b881b74ba8767509939c2dc9e3bd42cd7b078040a4
font_01_sfnt_off000084cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CF 15008 bytes
SHA-256: 711291158b0e2649b3b3c93f99fac2fd3eb2a2e4b7ca53ebf4231a4915316e6d

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