Malicious PDF — malware analysis report

Static analysis result for SHA-256 500a5ea2c8e18ef7…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 02:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a2efc554c49fe455c4b66ff92d0ebd SHA-1: 0b96202f2812d743e1d055f62966faa5b44b35d0 SHA-256: 500a5ea2c8e18ef7657a74634ca8c6055b7e7c409f56eb5f6657945bd49a80e1
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, forming a link farm designed to redirect users to malicious websites. The primary malicious redirector is identified as ttraff.ru, which is used in conjunction with keywords like 'padma shri award 2018 list pdf' to lure victims. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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/wb?keyword=padma%20shri%20award%202018%20list%20pdf
    • http://files.esoterichealing.com/uploads/1/3/0/9/130969790/9baa326593813b3.pdf
    • http://wutir.racheltepfercopeland.com/uploads/1/3/1/8/131871921/nanazimeto_rupuzu.pdf
    • http://files.quillviolet.com/uploads/1/3/0/8/130874493/jaleximopolez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/vuwokawelelibejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8471/files/sojulizuvoweli.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/zidaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/padabavaxiwowoladinitoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/52506468329.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/muzezawuraxezazidowogow.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/xodamomoxokekegasisax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0932/files/discrete_mathematics_7th_edition_richard_johnsonbaugh.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/wobine.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4179/files/capricho_arabe_tab.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/44391016318.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_off00005d75.bin
b321ece404ac45745f2b8e87a25712abdd9651524a52e887d13dcd2abc4d140c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D75 5896 bytes
font_01_sfnt_off00007179.bin
7030bcd56d6455930fc4d389f0aaf37989eecb7a25ee3692203d933090033447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7179 9852 bytes

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