Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc0ce4a09cc72a7…

MALICIOUS

PDF

36.8 KB Created: 2020-08-24 15:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 942a63b3de268d6ad192935fd00ed31f SHA-1: 0c1ae9e2e313ffd9f6607437303c40ad871a10f4 SHA-256: 3bc0ce4a09cc72a71f6838ed62ed2e0a88120aed91c24dc1c2b78e02083bb208
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '7th grade math worksheets' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a link farm heuristic further supports the malicious redirection attempt.

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=7th+grade+math+worksheets+kuta+software In PDF document text
    • http://files.washington-commons.org/uploads/1/3/2/3/132303229/824b106.pdfIn PDF document text
    • http://mokeju.eartharkbotswana.com/uploads/1/3/1/4/131483245/5513673.pdfIn PDF document text
    • http://files.clarevet.com/uploads/1/3/0/7/130738814/6baf8b64a8319.pdfIn PDF document text
    • http://kojidog.kristengoetztattoo.com/uploads/1/3/2/6/132681670/nojaroz_foxekogu.pdfIn PDF document text
    • http://tevazasiz.harmonlab.org/uploads/1/3/1/3/131380213/mesopupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1235/6253/files/marshall_mid_anc_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/beginner_python_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/60098750555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/kixigiwevexiwubekuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1664/0917/files/zusovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2635/0999/files/hide_navigation_bar_android_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4160/8100/files/calligraphy_sheets_for_beginners.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000473e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x473E 5156 bytes
SHA-256: 9204a8574750ffec3c5df61f69e12b70cdc280fe69b6b79d1664e5866a5e8a12
font_01_sfnt_off000058df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58DF 9176 bytes
SHA-256: d51610a1172a768e1354e128c4cbfe26af5ef4e2e3f0f89125f2b06442ac80cd
font_02_sfnt_off0000783a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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