Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d402fed7b193dc…

MALICIOUS

PDF

90.4 KB Created: 2020-08-05 17:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5308d7070133544d8f887fe76872447 SHA-1: 4a479765eb9c9430a664776831c2c13dcf964c81 SHA-256: 39d402fed7b193dc4a2cc2ebe87053571a82c5915bbcc6c5929ca395a70fa61e
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 'ttraff.ru'. This URL is embedded within the document body, suggesting a social engineering attempt to trick the user into downloading a malicious file or visiting a compromised site. The PDF also exhibits characteristics of a link farm, further indicating malicious intent.

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=genetics+from+genes+to+genomes+5th+edition+pdf+download
    • http://files.cometsathleticboosters.com/uploads/1/3/1/3/131384025/193607.pdf
    • http://files.naiadflowyoga.com/uploads/1/3/0/7/130739174/5434441.pdf
    • http://files.rina-bansuri.com/uploads/1/3/1/4/131406659/kitufaxaga_sidisetiv_vexikitafot.pdf
    • http://files.tuscanoaks.org/uploads/1/3/1/3/131398541/sufiwate.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/9665389815.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/40704800764.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/2382376850.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/kibuweluzusefakatalirux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/timex_ironman_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/jusimovutozimobebupabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/27403486431.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/78426350763.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/putoxapobemiludofisa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/chemistry_notes_for_class_11_chapter_6.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_off00011881.bin
3b8dcb59e12bb80f738cbb32d064f6e24daeedd598a2bb4bc47f944a8161bf49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11881 5816 bytes
font_01_sfnt_off00012c3e.bin
902baeffb6787df6dcd533b8f125ae2333532c2b83f90856e46b317798b71c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 15024 bytes

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