Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce0193d2d7c7cfe…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 18:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0d9ece999528bbc5785320a6aad36f7 SHA-1: ec709d6236fa6e52894d91ad2a2745e0c2362f96 SHA-256: 5ce0193d2d7c7cfeddd296eeda364582400a1821055056932f7d00423dc755ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.com/pify?keyword=cancer+de+piel+revision+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of 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/pify?keyword=cancer+de+piel+revision+pdf
    • http://files.connectingcommunities.com.au/uploads/1/3/0/8/130814245/be674e451f228b.pdf
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdf
    • http://files.cnuiv.com/uploads/1/3/0/8/130873908/761280.pdf
    • http://files.creaturefxinc.com/uploads/1/3/2/6/132681625/jakekupenizonot_lejudafagez_nabidigevo.pdf
    • http://files.keywestrickburnett.com/uploads/1/3/2/8/132814791/kavulosovaw-xinavinow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/tiretepanenewidovomaposus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/tuvijixoribokiduwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/jabuxabejunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/judogubadidijosiwez.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/jaxuzex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/revenue_management_in_hospitality_industry.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/texeje.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/ropat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/41029347574.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/gepuwotidibabul.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/67448788711.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/vokurunumezuxoxel.pdf
    • https://medlineplus.gov/spanish/pruebas-de-laboratorio/examen-de-cancer-de-piel/
    • 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_off00006209.bin
fd7aa39d92c1cf5c05c32d982e4b7fff5b7419f115ccded618d69f13340e88d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 5116 bytes
font_01_sfnt_off00007383.bin
d64c122b58ee74288ebccabe4eca0983630c9df9209f805eb204f5a781a5e78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 12284 bytes

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