Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f0d560656e1e72…

MALICIOUS

PDF

75.8 KB Created: 2020-08-15 02:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b74b3e60c909f8ee422cd58b2f0e144 SHA-1: 3baea40232af3cd566eddf3995aa3adee5776753 SHA-256: 08f0d560656e1e721e63db7fb99b38b0daa043a1ea156cebb2dcf83d5b3e22e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/wb?keyword=libros%20de%20gilles%20deleuze%20en%20pdf'. The document body, though partially corrupted, also contains this URL, indicating a likely attempt to lure users to malicious content.

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/wb?keyword=libros%20de%20gilles%20deleuze%20en%20pdf
    • http://files.enchantedboutiquemn.com/uploads/1/3/0/8/130814032/tivazodinemoxux.pdf
    • http://files.heartfelthandsbirthservices.com/uploads/1/3/1/8/131871874/238722.pdf
    • http://patoz.adamvoss.com/uploads/1/3/1/8/131871479/tetixivilos.pdf
    • http://jedeku.gunillakester.com/uploads/1/3/0/8/130814851/2007573.pdf
    • http://files.pinchalog.de/uploads/1/3/1/4/131454620/zivavegozatizinaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/fumusaxifakasuxamomoru.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/19568996289.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/1228015865.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/evento_vascular_cerebral_isquemico_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/kikorepofixaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/gesibanowajuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/soluciones_isotonico_hipotonico_hipertonico.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/7128144038.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/verb_to_be_affirmative_negative_and_interrogative_forms.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_off0000e0b5.bin
ec2c310efe229fb10a9cfb6b7f9c6a8c3add3dc1e8ae249bbf22aa0652561903		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5128 bytes
font_01_sfnt_off0000f23a.bin
2fd14ca3ec76bc54627361bc0f287ecb366a833cbde73dbe7c3ebfc056b50e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 15380 bytes

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