Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c8872ece1a92b7…

MALICIOUS

PDF

62.7 KB Created: 2020-08-20 18:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07369cf73cad81b61b3c90dfcd1a8005 SHA-1: 50450a9912717cc46d09d79b0c340aedfe3aef4e SHA-256: 43c8872ece1a92b79186c32916a40313714ea5abe77d82776590715186749adb
150 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=aulad+ke+huqooq+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=aulad+ke+huqooq+pdf
    • http://files.coxevolab.org/uploads/1/3/1/4/131452922/velufiwizinefobu.pdf
    • http://boweko.messyhandshappyhearts.com/uploads/1/3/0/8/130813604/xawumavenivok_riwawaletefeduf_xoded.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.walkinginthewordministries.net/uploads/1/3/2/3/132303189/e90b0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/update_node_nvm.pdf
    • https://cdn.shopify.com/s/files/1/0441/2584/7704/files/character_analysis_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/71025576670.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/anti_bribery_law_saudi_arabia.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/lodenufaxisaxireloju.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/dinazerezovororawijof.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/37305485551.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/dnd_5e_cause_fear.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegegezanonipilupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9924/3174/files/warehouse_inventory_spreadsheet_sample.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c264.bin
761a051d201a52c77337b301aacf538c68448b6f6e134bb06ad5ddca58161160		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC264 23976 bytes
font_00_sfnt_off000082e5.bin
672604791d1068fd4138f78bf4bf6c85535083360896a21def56760c6a792fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E5 5036 bytes
font_01_sfnt_off000093fc.bin
de67cd4569ce1bfb7c181b5be018a1bfcea8365efa97b2e63d65b2120a6dc782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93FC 14856 bytes

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