Malicious PDF — malware analysis report

Static analysis result for SHA-256 18658ee90f0549a8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 23:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fc4c3e3a486cc54cd651f0cdeacd016 SHA-1: 17f9e4ac5e91dfcf3bc4190a0b7db3f5ee2dcab4 SHA-256: 18658ee90f0549a86beb56a625842ca107cdb0f0c244f981760753082cae33ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'free family feud template google slides', indicating a social engineering attempt. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly suggests this PDF is designed to lead users to malicious sites.

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=free+family+feud+template+google+slides
    • http://files.scwineryreview.com/uploads/1/3/1/6/131606198/bakexowi-xawope-nedowividiruliz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/24883746721.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7383/files/broiler_chicken_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/ninuzemikuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/convert_to_word_acrobat_xi_pro.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/74084087104.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/61735831279.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/tv_guide_louisville_ky.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/libros_para_colorear_de_paw_patrol.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/muvowelefomadolazu.pdf
    • https://cdn.shopify.com/s/files/1/0449/5418/9983/files/timejavekawiworeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/searching_and_sorting_algorithms_in_c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005961.bin
40bfe440079ec7b27a539a0dd8a754b114ad49062b9e3ed5ed234ad1bfe42a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 5196 bytes
font_01_sfnt_off00006b1a.bin
a54f13d9b2707b7ad0c96c20282ba7c28cf76d9b2c2d3d46a7a5c3f4bc4fe5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 9372 bytes
font_02_sfnt_off00008b2d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2D 4324 bytes

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