Malicious PDF — malware analysis report

Static analysis result for SHA-256 394135a0d38f765a…

MALICIOUS

PDF

75.8 KB Created: 2020-10-04 19:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0243b2369416375b09e885e8fffc836 SHA-1: 17896bfdec614d62aad9e5b144a69f49af41c9fc SHA-256: 394135a0d38f765a6be59b180e0f28f0ac0ab414d492af88a478c4ac5ef0bfef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body itself is heavily obfuscated but contains a URL that appears to be part of a link farm designed to attract traffic. The primary function of this document is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://gettraff.ru/strik?keyword=la+celestina+resumen+por+capitulos+pdf
    • https://site-1036698.mozfiles.com/files/1036698/75613730003.pdf
    • https://site-1039837.mozfiles.com/files/1039837/fewadugejo.pdf
    • https://site-1036630.mozfiles.com/files/1036630/suremajin.pdf
    • https://site-1039190.mozfiles.com/files/1039190/fejog.pdf
    • https://site-1043291.mozfiles.com/files/1043291/80850176560.pdf
    • http://files.routonsofhenrycounty.com/uploads/1/3/1/4/131483143/vomitujebazosopovisi.pdf
    • http://xanitumut.yestelesummit.com/uploads/1/3/1/4/131453996/wumokazoniwiv.pdf
    • http://files.mpadvantage.com.au/uploads/1/3/1/3/131380438/xademadoburabeva.pdf
    • https://site-1037887.mozfiles.com/files/1037887/raxugafimezuxor.pdf
    • https://site-1041942.mozfiles.com/files/1041942/90016579162.pdf
    • https://site-1040322.mozfiles.com/files/1040322/kapowumawamipobenagud.pdf
    • https://site-1036644.mozfiles.com/files/1036644/3947240083.pdf
    • https://site-1039528.mozfiles.com/files/1039528/zagolovumediduxup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0479/5190/4924/files/white_rabbit_alice_in_wonderland_costume.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/the_power_of_logic_5th_edition_answer_key_chapter_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/words_that_start_with_v_that_are_positive.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011816.bin
c22cb2b08ac5989ba8899c7fd9281e20345311f671bee33680450ee02ac43d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11816 5124 bytes

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