Malicious PDF — malware analysis report

Static analysis result for SHA-256 412cb062e78f7a2d…

MALICIOUS

PDF

47.2 KB Created: 2020-08-04 09:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2319983a2961106fa45c1fe538294f7 SHA-1: 18a21b50523921459378ffbec45a95129fc6d6fe SHA-256: 412cb062e78f7a2da2843eb43cd322a41aea114ea0292569898f6ef87cfc2bf4
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=begrijpend+lezen+groep+7+werkbladen+pdf', is designed to redirect users to malicious content. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify domains but also include several unknown domains that could host further malicious content. The ML classifier strongly indicated maliciousness.

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=begrijpend+lezen+groep+7+werkbladen+pdf In PDF document text
    • http://files.loveforellie.com/uploads/1/3/2/8/132815183/c51903fa.pdfIn PDF document text
    • http://files.assuringyourcomfort.com/uploads/1/3/2/6/132681342/goxabigoluridu.pdfIn PDF document text
    • http://files.jasmineforbuncombe.org/uploads/1/3/1/4/131483955/silemob.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/1/0444/4153/4631/files/francis_turbine_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/53180492207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/94684023887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/58113388217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/vowixuwanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/91874249329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/fubirapurozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/zopeperojakiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4151/1834/files/74784551842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/43728100686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/pewige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9074/5246/files/54934350135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/5655342512.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0C 5292 bytes
SHA-256: 40cda628272f2e4fae1507463c6bdbe6ac3ab796533c9126292461142dacebb3
font_01_sfnt_off00007d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2C 10912 bytes
SHA-256: 8eb276bbc9f476726ea70cb05a04f5950693e32418a20f7b0e7184a749629e8d
font_02_sfnt_off0000a180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA180 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f