Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e005e7e23ddcc2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 15:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a017f7d3734cf3bc3683ea578f1f840 SHA-1: 210bdccdffc94830a682ff80358fff9fb8529bf6 SHA-256: 21e005e7e23ddcc2875e0ad4154fd03cb158b3057f673f44687033172faf850f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=command+prompt+reference+pdf'. This URL is embedded within the document body, disguised as a 'Command prompt reference pdf'. The presence of a link farm with numerous external PDF links, many hosted on Shopify, further suggests an SEO poisoning or link farm attack. The document's content appears to be a lure to drive traffic to malicious infrastructure.

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=command+prompt+reference+pdf
    • http://files.sculptedroots.com/uploads/1/3/1/4/131483955/3598002.pdf
    • http://fegezo.humanistcelebrantscotland.org/uploads/1/3/1/6/131636725/galugepelupof_morafuboj_nadopemanitatop_mexenutakojo.pdf
    • http://files.dirtbagshop.com/uploads/1/3/0/7/130738554/3992281.pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0437/1264/3227/files/algebra_2_final_exam_review_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9400/6177/files/que_estudia_la_psicologia_social.pdf
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/20869665611.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4815/files/67301111976.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/12103812941.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/milan_cathedral_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/arneth_count.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/exception_handling_in_c_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/bewapigav.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/recombinant_dna_genes_and_genomes.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_off0000729f.bin
9dba28e431b2a4ecbb677b211eac03ed73037013dd6bbb903398bc959f946754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 4996 bytes
font_01_sfnt_off00008385.bin
56e12c9f025200df0991849870bd820b076749d19a0591af1c23dd02aaae6b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 10948 bytes

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