Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a94d2ed6a7031b…

MALICIOUS

PDF

50.0 KB Created: 2020-07-31 06:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3c9a3dc267c2e339690c5a06a294a48 SHA-1: 5e8ab570eb22d7a50892aedc7c80680c115f3a2c SHA-256: 14a94d2ed6a7031bca069f9be2aca7c38ef1e18b8e5f5da5364d20984401e73f
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 pointing to Shopify domains hosting other PDFs, indicative of a link farm or SEO poisoning campaign. One of the primary links directs to a known malicious redirector infrastructure. While no scripts were extracted, the structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content or further malware distribution.

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=anemia+megaloblastica+pdf+elsevier
    • http://files.ethanallenrattery.com/uploads/1/3/0/8/130874238/7771840.pdf
    • http://files.drdeirdra-faithcounselingllc.com/uploads/1/3/1/3/131383553/ludaxilimi.pdf
    • http://files.phcfamily.org/uploads/1/3/2/7/132710603/9997487.pdf
    • http://files.nancydcreativeart.com/uploads/1/3/0/9/130969580/e56ccc4.pdf
    • http://files.niloalcala.com/uploads/1/3/0/9/130969428/puwate-wutevug-dapapote-timivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/gexirubunofetovukasokazot.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/tegiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/40971870549.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/nitasuxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/vatewijamobusubikabudixij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/90547747306.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexivopagutufaxusezonav.pdf
    • https://cdn.shopify.com/s/files/1/0437/4423/1575/files/22325647523.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/73682124661.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/mezasujirenisupiwoketo.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_off00007a0c.bin
700af8020891bb7eeb2b63604c362e894007ba222aa4d27998ee30348cd5bcb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0C 5452 bytes
font_01_sfnt_off00008c77.bin
6fb288e6306a6bfda695708f1ec031fb334c7ca44cb728eaef174a853ef38b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C77 15028 bytes

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