Malicious PDF — malware analysis report

Static analysis result for SHA-256 69292e6bcb9ea700…

MALICIOUS

PDF

44.3 KB Created: 2020-08-24 16:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1132e7a84e33f88fcb60e9666d29ce SHA-1: d13339e67cab90e7992c7d4b2ca799fc6b646063 SHA-256: 69292e6bcb9ea7004c6811788f115ffacbeda2cd2fbfc9b4e550cc0d9942a895
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 a redirector URL. The document body, though heavily obfuscated, contains text related to a worksheet and a URL that appears to be a lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection attempt to malicious infrastructure.

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.ru/pify?keyword=characteristics+of+living+things+worksheet+answers
    • http://sopabezax.kirklandlakeartsclub.com/uploads/1/3/1/4/131438563/1624cfff4bd2.pdf
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdf
    • http://files.baxplumbing.co.uk/uploads/1/3/1/4/131406390/rowaximipekatuw-laziguxunirut-fubavunogedej.pdf
    • http://files.livinglightwellness.com/uploads/1/3/2/6/132681482/wulikonis-puruxogoruz-nafem.pdf
    • http://files.inspiredbyadele.com/uploads/1/3/0/7/130739783/188027.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/xirizodelumefodatevobokox.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/dinam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/vexebixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/26082598372.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/87224958483.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/guwoxevumojovadanagekazuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/69660816922.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7294/files/ruxagabesalozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/tafelawawazuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7433/0517/files/vulaj.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_off00006f64.bin
dd095811964affcb521748300a41825e71ff3cd6c096e20acc7d19179a26255e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5264 bytes
font_01_sfnt_off00008161.bin
5eddb0c2e1893c0f4d1fe6477ea6e467f517f47cfb41b68f6881993ae7d8873b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8161 10164 bytes

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