Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9bee8879bef4c7…

MALICIOUS

PDF

115.4 KB Created: 2020-08-11 23:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43fe4aab755046af7b3129de40b33b6e SHA-1: 7140353cde90deb0239341cd8b5d18e4e9a1df87 SHA-256: 6d9bee8879bef4c75f6a271de2c0ac5eeee7350115de1cd514dff8fe9a17dd05
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://ttraff.cc/pify?keyword=infinity+mathematics+pdf
    • http://loleziv.theroanokerestaurant.com/uploads/1/3/1/0/131071041/bulire.pdf
    • http://files.photoglens.com/uploads/1/3/1/4/131482976/2884371.pdf
    • http://files.enkisuma.org/uploads/1/3/0/8/130874257/paruganufijadove.pdf
    • http://files.apdcwa.org/uploads/1/3/0/9/130969435/kenixumajoz-kuladuba-wutorixevetik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/javofuwudeganukeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4302/9143/files/mva_form_dl-_202.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/70137561997.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/java_code_snippet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/yard_machine_snow_blower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/zumikemoxadawebodopib.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/mm_to_cm_conversion_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/fosedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/wefagijesugajufuwof.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/tevigiteminajubozubov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/promenades_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/caveman_diet_meal_plan.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
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHong
    • http://www.geocities.com/dnhhng
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114df.bin
19e425d68dfe36301db90bae8e833881f0aa73ae4cbe63a99581e0e38f31924d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114DF 3976 bytes
font_01_sfnt_off000122e0.bin
f40a83dc76fb2c8d66479e0acb1ddbf641b7f5f64c41f57137bd0bf7c9f3a9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 5304 bytes
font_02_sfnt_off000134bb.bin
01e1007261053f41cc6fc87fe25df83e52c9e84432781f745964dedc794331d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134BB 3292 bytes
font_03_sfnt_off00014199.bin
343003a0189d15cdd25cc5b1c7b18a617045e11e4a495cff4d4221b4c6c6b9ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14199 4412 bytes
font_04_sfnt_off00014f2c.bin
c6dcd548442b101a016af7a542e3dc08878ff8ef4ba844f8ddd32910dd4ce4cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2C 6316 bytes
font_05_sfnt_off00015fba.bin
e09351e60dffeab934326eafefe9936f6c3777cfa42178d5e86fd208b91bccaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBA 17944 bytes
font_06_sfnt_off00019731.bin
513ed46d99093e10832f9177f6873790093bc6345ff68643eccc0443e8bbaba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19731 16436 bytes
font_07_sfnt_off0001ad7d.bin
e7df87bd9b01f15d92e9da8a7ac79b780170950d01616ab6e9c60a90077d57aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD7D 6460 bytes

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