Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ac18c7f2fbd969…

MALICIOUS

PDF

42.8 KB Created: 2020-10-28 01:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce86c28bfa91bda1da2a2462aa12bf04 SHA-1: c44a34631f91b05bc829a697215742dc4ab5a55d SHA-256: 87ac18c7f2fbd969869f2d7843d1e2c6e2ad44dcd7257012ee4bed2f1fc23a0c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Mortal Kombat trilogy pc controls' and a URL, suggesting a lure to a malicious site. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=mortal+kombat+trilogy+pc+controls
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8c13928725f.pdf
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8a4e6905ef2.pdf
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5f907cbe1ca3d.pdf
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8827058b009.pdf
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5f98a17b2e0a8.pdf
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f920700c546a.pdf
    • https://cdn-cms.f-static.net/uploads/4414173/normal_5f9622b2887b7.pdf
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8f76888258e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/remembering_the_kanji_3_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0493/2360/6175/files/rozabudofibuf.pdf
    • https://s3.amazonaws.com/nezanurugega/ms_excel_2010_advanced_tutorial.pdf
    • https://s3.amazonaws.com/vokeri/cengage_neet_chemistry_book.pdf
    • https://s3.amazonaws.com/susopuzupure/fanefep.pdf
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/kadonowetibet.pdf
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/nc_driver_handbook_scavenger_hunt_answers.pdf
    • https://cdn.shopify.com/s/files/1/0496/1386/5124/files/elite_bistro_4qt_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0501/5827/2691/files/53995918352.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/53446916481.pdf
    • https://s3.amazonaws.com/zirojopemup/69750466386.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ee.bin
69791b409e9c42a5a012d02a4b84d4623a185f7eaa83a72d2dd2e4feb6ed5d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EE 5564 bytes
font_01_sfnt_off00007ad9.bin
71f785e4e5cf42b888bf0b5e1d724020ec6ff54af53d555395e0239cc65a2193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 10328 bytes

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