Malicious PDF — malware analysis report

Static analysis result for SHA-256 722c5fe7d63a3d95…

MALICIOUS

PDF

52.2 KB Created: 2020-08-06 20:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ed5af17038957885aaf811215a03c2 SHA-1: 81e8389a067773652ecb19b982146a0ebed9abfd SHA-256: 722c5fe7d63a3d95fe030a5225979b96e845aea6396b4809366fef867beb8eee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL. The document body, though corrupted, contains text related to 'rural area certificate' and the malicious URL, suggesting a phishing or social engineering lure. The presence of a link farm further indicates malicious intent, likely to distribute further payloads or redirect to malicious sites.

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=rural+area+certificate+rajasthan+pdf
    • http://files.logicianmedia.com/uploads/1/3/1/8/131856100/4a92e00b2887be.pdf
    • http://files.npsarea12.com/uploads/1/3/1/6/131606546/vanabigawabel_xenogeva_babimofu_pisutikitafabo.pdf
    • http://disig.stmildreds.org.uk/uploads/1/3/2/7/132712207/beledu_ruxiji_waruvamidise_xamavixuxi.pdf
    • http://files.rivermenrodandgunclub.com/uploads/1/3/2/3/132302973/nomegariwutok-wibiwu-visinatixubuj-sojimuta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/85445360267.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/xenixapuzaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/rusufuxilutavurebefus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/xupomek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/43068678903.pdf
    • https://cdn.shopify.com/s/files/1/0440/3098/4357/files/nepot.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/23149218649.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/ruwiwukifizujewiviv.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/sura_ar_rahman_bangla_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/35596218731.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/rubazemakibawopumerofemen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/28971554458.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/baregijawufokagigeji.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_off00008e57.bin
2799a5cbd73e1a433bc8724013ead7b9de35a5b4e6f507760747b1665031ffc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E57 5328 bytes
font_01_sfnt_off0000a077.bin
2b65862c325876bffe9b2e0418109f7a9e50a6a943b24a5e681d273de613fce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA077 10412 bytes

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