Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc24619a89ee672d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 16:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb02c00c5e0a58105cc6a0e4060c49c0 SHA-1: 7558f7ae8dce6869056ff270379905efa37e5831 SHA-256: dc24619a89ee672d196e1dee394d122d95737c41afb18eaca9cefefd67bd6120
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to IELTS speaking topics, likely to trick users into visiting the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, further supporting a malicious intent to drive traffic to potentially harmful sites.

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=ielts+speaking+topics+with+answers+part+1 In PDF document text
    • http://files.mountainbikegreenville.com/uploads/1/3/0/7/130739688/4ed468a719.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/1/0444/4022/3911/files/michael_cembalest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/49242729159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/rijurewatuzirijatufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/12365038497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/razisonetolibevedol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/english_learning_book_in_urdu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/le_royaume_betsileo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/siparegulagotopit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/basel_iii_finalising_post_crisis_reforms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/ball_bearing_nomenclature.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 2

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_off00005b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B37 5340 bytes
SHA-256: 78453f93f45b374b5128f26aecd1ccc84a8f69fae6891f3fa8ee19dabef66823
font_01_sfnt_off00006d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 10204 bytes
SHA-256: 6c71274604a1942a88306da2572b734582fd525ba5e9d7cfe4394384a5b2145c
font_02_sfnt_off00009048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9048 16080 bytes
SHA-256: 94e9ec2320e1b64897f920c438d9cca58daef586678d4396aa249c79879d90b4

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