Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e6a0162499b92d…

MALICIOUS

PDF

64.5 KB Created: 2020-09-05 21:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5278b4441e922b927640f8ecd1329f8d SHA-1: 192c4caf92b4bb89629f52c7829bedfe7b180cf7 SHA-256: c6e6a0162499b92d8dfc2c384983c8a15981d6187b959704cbe402f29f2b613f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=certificate+of+school+attendance+template', is designed to lead users to malicious infrastructure. The PDF also contains a large number of external links, many of which are benign Shopify links, suggesting a link farm or SEO manipulation tactic.

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.cc/wix?keyword=certificate+of+school+attendance+template In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/dance_with_the_devil_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/paint_and_sip_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7586/6519/files/60129043071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/aristoteles_latinus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/89381210851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/liwib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/zesiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/pozojijomimavariniwuwagal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/mobile_phone_addiction_questionnaire.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8cbfce_fc9c1a1421ab424f9964f6e88f35cb84.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eb5a6a_f055d5ac66a944ef921b73d02573874a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ebbcbd_2b0fd37584b24567a97cafe2763dba03.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e7e4a0_7f4ca4716f8f4f6fb947a8f4995809e6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/afe78f_44168bdf343d44d482107afb29e7103f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/7873/7061/files/81876088892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/cursive_writing_tracing_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off0000bdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAF 5300 bytes
SHA-256: 7afa26a276f773353eb49a25bacf44054fa6d7e510f96774a944a5906e7af4c9
font_02_sfnt_off0000cf88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF88 10160 bytes
SHA-256: 08f18dc4e2a808af4d97fed6539a99037b007956f228b43f34eddb4214fdd44c

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