Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c6c3dbdb29f0e4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 08:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cebc06fb8ee8e03d3e6f09b343bec65 SHA-1: 5507c64e07423eb2bb701001d416ad3a3e09ce6b SHA-256: 79c6c3dbdb29f0e42d76dc6b12ccff8f9e7ba171b2fd738e09b35a136ec57b24
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a link farm or redirection attack designed to lead users to malicious content. The document body contains garbled text and a reference to 'busybody crossword puzzle answer', likely a lure to disguise the malicious intent. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=busybody+crossword+puzzle+answer
    • http://files.doodadsandtulle.com/uploads/1/3/2/6/132695478/bakujerup_revogogenamo.pdf
    • http://files.kleinandpartners.com/uploads/1/3/2/8/132815806/fumenabek_nesiki.pdf
    • http://files.thicketblog.com/uploads/1/3/0/9/130969572/9797647.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/pozujamor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/absorbent_mind_maria_montessori.pdf
    • https://cdn.shopify.com/s/files/1/0434/6763/6902/files/paulo_coelho_aleph_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/sewuvenonekekoxemawidumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/best_sellers_novels_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/75421946382.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/18527207098.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/stored_procedure_in_mysql_tutorial_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/lotap.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/linusopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/44802699885.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665b.bin
4542d4bf02737e52ad6b21fff46629a326478d3635bd1f2052741c19ae05438d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 5500 bytes
font_01_sfnt_off0000792c.bin
38010dd1679e3c065b1f4996169a87fa228596e60d12c286d1ed87ae0dd9a3ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 10204 bytes

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