Malicious PDF — malware analysis report

Static analysis result for SHA-256 6166377575e14d55…

MALICIOUS

PDF

50.4 KB Created: 2020-08-09 04:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ab85737720e3f91ac09609d8c0a913 SHA-1: 9b92b089ee87208ecbb04d6ac8d00d5c927ca4a8 SHA-256: 6166377575e14d55e32465bc7458d18c9256f1aa82f2616ccf5d7202c11a40a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a link farm designed to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=management+of+abdominal+compartment+syndrome+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it under the guise of a legitimate PDF download.

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=management+of+abdominal+compartment+syndrome+pdf
    • http://files.automatedcablesolutions.co.uk/uploads/1/3/1/4/131407980/sisazivizika-fofonuto.pdf
    • http://files.catherinedonzephotography.com/uploads/1/3/1/8/131856646/voxili.pdf
    • http://files.webblox.com/uploads/1/3/1/6/131637896/rakepakotijopoz.pdf
    • http://files.rustypistolsreloaded.com/uploads/1/3/0/8/130874253/wituled.pdf
    • http://files.marcusciderfest.com/uploads/1/3/0/8/130813357/dolilomu_tubireneper_womawadavalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/ponopowofisew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/91053739301.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/practical_flow_cytometry_in_haematology_diagnosis_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/74982257534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/gigegozosojepuwuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/diccionario_biblico_reina_valera_1960_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/46611341765.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/vopuvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/iteration_of_rational_functions.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006495.bin
677ce4327773317b521d4ae8990dfc1a15319c94537d267eb113973f366c247c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 5724 bytes
font_01_sfnt_off00007803.bin
25fed082716b4c514fcc72778a3f2d07a7a852112776a5e152aa7dfdfb2df464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 1944 bytes
font_02_sfnt_off0000814e.bin
c4b4626cf6d79c88c231b902a415fadfa02ec0dea9b0f04ddac51abdb5e7a60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814E 10248 bytes
font_03_sfnt_off0000a3fd.bin
b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FD 16312 bytes

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