Malicious PDF — malware analysis report

Static analysis result for SHA-256 0782ff63e534e0e4…

MALICIOUS

PDF

52.4 KB Created: 2020-08-06 03:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a208cb0cafca5b5d4a0e11aafc70059e SHA-1: 0617536291bb4975fa2d42a791b01a2c4adfcc4e SHA-256: 0782ff63e534e0e44344a0fc7a89da5f81f3590a07af8e7dd46c125646e74a27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external PDF files, likely as part of a link farm, and a critical link to a known malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=faringitis+viral+y+bacteriana+pdf, which is designed to redirect the user to further malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure related to medical information.

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=faringitis+viral+y+bacteriana+pdf
    • http://files.laurenratcliffe.com/uploads/1/3/1/8/131856949/42fe5.pdf
    • http://bubum.vikurkennel.com/uploads/1/3/0/8/130874104/1350939.pdf
    • http://files.michellefairley77.com/uploads/1/3/0/8/130873979/narop_vumuxilefino_vekug.pdf
    • http://files.photoncutterstudios.com/uploads/1/3/1/6/131637309/futotonetate.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/pojeladapemolekevex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/81067379042.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/pergola_bioclimatique.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/wilelaziseferodi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3687/4651/files/94691228313.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/9560664351.pdf
    • https://cdn.shopify.com/s/files/1/0431/9153/3725/files/juvenafuratibevujik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/10461314939.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/86902865205.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/76732163495.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/los_factores_bioticos_y_abioticos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/16262721986.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_off00008e6f.bin
b7663ab2e400c058cacbde374412a7c6e7617ff2ffe5671a5b9a6bfa9252bb24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6F 5580 bytes
font_01_sfnt_off0000a184.bin
b064429ce576fe41e96df07906ffd505b663ae1894b2f0a2cf756a40aefb546f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA184 10116 bytes

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