Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e0a34b4d2a7a92…

MALICIOUS

PDF

40.1 KB Created: 2020-08-02 13:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40a46cfd26a3dcb86a699962cdfaa274 SHA-1: 4754ba67c754d96b5d31693f29785c1e054be30d SHA-256: 61e0a34b4d2a7a9294dfe34d43f107b1dd9618328bdb7798183515dda88a4077
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the critical redirector heuristic strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wb?keyword=rectangle%20shape%20worksheet%20for%20preschool
    • http://files.kentuckybyhorse.com/uploads/1/3/0/8/130814076/dajosoloxavaputon.pdf
    • http://files.talkingaboutteaching.com/uploads/1/3/0/7/130776406/2ff47b77.pdf
    • http://files.egpcrafts.com/uploads/1/3/1/4/131438142/5dce5d42.pdf
    • http://files.sunflowerchamberorchestra.org/uploads/1/3/1/4/131438018/gumaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78214852322.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/88533242386.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/69384269464.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/fugelujigedetumeni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kebiwubinixakagaxirefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/45412856185.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/embedding_image_html.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/35564116722.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/78222803772.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/zopitenetam.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/98443598005.pdf
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/717985251.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/27685047144.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/lokolitagozaviresabola.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f2d.bin
20a898604257329f8818e5a7e131374a619531e5038b1fffcf76d2147d2a7690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2D 5440 bytes
font_01_sfnt_off000071c6.bin
61af027ae6957995c584d59506841798da39a3a5c2d811c1a751cca9e2cc2712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C6 9788 bytes

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