Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c24b1ac5549f56…

MALICIOUS

PDF

41.7 KB Created: 2020-08-27 16:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a68120a4594d2742fdf974e31bd967d2 SHA-1: 60af549e72e1c207a14c03afbc00c8705c242114 SHA-256: 78c24b1ac5549f56ee9cfd7ae05dc43e31686a9e4f220c9735a13f25ab50ec3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.club'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to 'El librero de gutenberg' and includes the malicious URL, reinforcing the redirection attempt.

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.club/pify?keyword=el+librero+de+gutenberg In PDF document text
    • http://govakone.meccadance.com/uploads/1/3/2/6/132681504/gadatumaripag.pdfIn PDF document text
    • http://lugag.functionalhealthcoach.com.au/uploads/1/3/0/9/130969873/22a8c16b43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3496/files/jakirewazan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/30733833285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/zuvefewamosok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/manurixuvesidabogekoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/solid_converter_9._2_full_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/chronicles_of_riddick_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/38137077221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/33617757581.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 4700 bytes
SHA-256: 4984ef7eeef06ec960dfdb8a5fdb5f1e9c0ec70df476ed63bba17fc00f7c2f87
font_01_sfnt_off00007364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7364 11556 bytes
SHA-256: 18c23c782a805fe5f0d7531e9b427bb23d855c946742d70f51b1cc28bd153b28

Open this report in the interactive analyzer, or submit your own file for analysis.