Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20fae1cbac6dfde…

MALICIOUS

PDF

93.7 KB Created: 2020-08-06 15:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1513d5c7273289c62a15dc58709247e6 SHA-1: 9ceb263c299dd02d18efac544e5727a33ce1c0fe SHA-256: a20fae1cbac6dfde339628b1d43fc0ebd131a422c5702b56db8f1dfd084f0e9c
152 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. The embedded URL 'https://ttraff.com/pify?keyword=capitalisme+d%25C3%25A9finition+pdf' is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to trick the user into clicking it. The presence of numerous Shopify-hosted PDF links further supports the link farm heuristic.

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/pify?keyword=capitalisme+d%25C3%25A9finition+pdf
    • http://vajajem.salmochildrenscentre.net/uploads/1/3/0/7/130775897/9858029.pdf
    • http://files.mybabybooksa.com/uploads/1/3/1/4/131483138/kabonojoxa.pdf
    • http://files.amrconsortium.org/uploads/1/3/0/7/130775922/38bc9fd8f8.pdf
    • http://files.heartofachildministries.org/uploads/1/3/0/9/130969591/3823713.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2916/files/giwewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/lerizagojiru.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/favatu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/14749725459.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/50038783888.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/dodexa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/senevedamozerasosurog.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/rafivukik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/43634092969.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2695/files/how_to_electronically_sign_documents_without_printing.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/34532724035.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8720/files/96385296793.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/nenekozeligidisuxiwud.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/wedding_planner_handbook.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ec3.bin
5b03e4dfda8df791295476af7c138cfd755095072c0ee17c58247beffd3395d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 5136 bytes
font_01_sfnt_off00013fe4.bin
58ed9e5456a3fe53cbb5b840f0b13c2efbc2ceeab3958bd48c6f09677660a28d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE4 12604 bytes

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