Malicious PDF — malware analysis report

Static analysis result for SHA-256 60960d40b3b1b5d3…

MALICIOUS

PDF

35.8 KB Created: 2020-08-15 00:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b909d71d170b703b699869418ad998c7 SHA-1: f8f7b03d06079ea258aa5290cef4421dfeb37f0f SHA-256: 60960d40b3b1b5d33762de2dd65262219fe55c94b8be0604cccf9f8a41341d15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure known for malicious activity. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful websites.

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://ttraff.com/wb?keyword=montana%20state%20university%20map%20pdf
    • http://files.gillianshippey.org/uploads/1/3/0/8/130813988/xonulasesamil.pdf
    • http://files.handmadewithlove901.com/uploads/1/3/2/6/132683165/mosifizebowodazev.pdf
    • http://files.mxsnrgy.com/uploads/1/3/1/4/131453989/tejozetoniwas-nomigureni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/usa_home_address.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/crash_bandicoot_gba.pdf
    • https://cdn.shopify.com/s/files/1/0429/6939/9452/files/jafuzodupotixadiveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/somibajegesulimubeso.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/94477133360.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/cambridge_guided_bus_timetable_trumpington.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/a_posteriori_error_estimation_in_finite_element_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/jolopabumif.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/nolabunanekerafumozit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/autocad_tutorial_drawing_floor_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7434/files/11119072631.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/genetic_mutation_worksheet.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_off00004d04.bin
0d6d14425d45f650b0606a50a4852626edab82fd085556f5474c7d0062b4a50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D04 5320 bytes
font_01_sfnt_off00005f20.bin
eed6d7655670f96c0475d30685213ffffbc77112c85f0f21f180bd7b79c6a179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 10328 bytes

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