Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cb399e84030e33…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 17:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41cd6cc610c148a43fbd3d3a1a79046c SHA-1: 158e924dfae45968d29e4fcf9de4ced224143619 SHA-256: 04cb399e84030e33a6a2a55445856fc0a055e59c2ca7ee06659e01006f7f8974
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common SEO poisoning tactic, presenting itself as a 'Mathematics formula pdf for competitive exam in bengali' to lure victims. It contains numerous links, including one to the malicious redirector 'https://ttraff.cc/pify?keyword=mathematics+formula+pdf+for+competitive+exam+in+bengali', which is designed to lead users to further malicious content. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mathematics+formula+pdf+for+competitive+exam+in+bengali In PDF document text
    • http://files.valancourtbooks.com/uploads/1/3/0/7/130739298/8339197.pdfIn PDF document text
    • http://files.gracechasers13.com/uploads/1/3/2/8/132814898/34aa392821f204.pdfIn PDF document text
    • http://files.aquarianlibrarian.com/uploads/1/3/1/4/131406807/e19f8cc22a300d.pdfIn PDF document text
    • http://romup.owenashton.com/uploads/1/3/1/3/131379730/4786774.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/1/0428/9835/8432/files/8584587797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/albert_schweitzer_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/96670008310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/30648625836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/6025741694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5337/4874/files/43836686009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/66633726330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7485095273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6512/1699/files/code_academy_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/88099002456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/58099460142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/tixoniwobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/79769357035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/85390344773.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB5 5844 bytes
SHA-256: 8d410dc8a97715dd16ae2fcc3cb6c2aa95fd52db10df83b588500d40c4b91a44
font_01_sfnt_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 6424 bytes
SHA-256: 934059665de4f686869fb33bc0faaf0e4dab2a89ca3c8f63eaca3cdebd553145
font_02_sfnt_off00007542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 9724 bytes
SHA-256: 666df3a56148dd7d4865e8c96c41aa74e05bd1f87d599fb09e856f8dd8e82b53
font_03_sfnt_off0000967e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967E 16080 bytes
SHA-256: 28d5afbff6c2e9e687c0d9657fc0c8653379f131105490b33dc0c12c71f72ad8

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