Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b384fc84e7538f7…

MALICIOUS

PDF

52.2 KB Created: 2020-07-30 05:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b4f6ec94ee7a7c04001b206da7161ec SHA-1: 3f757eccc851e962edbe9e0eaff79ba333b6a0e1 SHA-256: 7b384fc84e7538f77d4f8f0518554b50a33e96c76091ea6dd65cde7b1effa552
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, suggests a lure related to 'basic algebraic equations'. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=basic+algebraic+equations+pdf In PDF document text
    • http://files.edgewaterfitnesscenter.com/uploads/1/3/1/3/131383943/5374111.pdfIn PDF document text
    • http://files.b-khairbooks.com/uploads/1/3/1/4/131413718/e8a5aabf5452e.pdfIn PDF document text
    • http://files.givingclosetproject.org/uploads/1/3/2/7/132712006/nubowa-woragumib-setilan-kavinuf.pdfIn PDF document text
    • http://files.mhcs.me/uploads/1/3/1/4/131411539/basipesuji_bolukibeju.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/581871399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/rafusopibabilape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/mibuxemewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/xusosif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/56936443891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/46623120960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/27149036335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/85051631592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/43475179606.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 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_off000079ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AE 5520 bytes
SHA-256: 2d5f449deefaa39377567ee7e35decf5503d95f48ef04a21451078b5c1c440c6
font_01_sfnt_off00008c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C66 10012 bytes
SHA-256: 452670c388e169e8d8410393bb9668e82af5a851b7733057f5d740f66226ca44
font_02_sfnt_off0000ae92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE92 16088 bytes
SHA-256: 9b6ad5722d12b30ebaf898f562fd4d85af749794f3aca0f1f676e444c262175b

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