Malicious PDF — malware analysis report

Static analysis result for SHA-256 002e3a1f1cf804c3…

MALICIOUS

PDF

35.4 KB Created: 2020-08-30 14:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b174595bf6fb885e7c4b1cb0bf4623d SHA-1: c0e7c7ee723e2f5c44c9031b78fd23463c07b6cd SHA-256: 002e3a1f1cf804c3e2e79239c4f6ebbc43a88c4b467c86fbd7dc09341d9ae6f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged as malicious by an ML classifier and contains numerous external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=bombo+murguero+de+26+pouces+%25C3%25A0+centim, which is also listed as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious 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://ttraff.com/wix?keyword=bombo+murguero+de+26+pouces+%25C3%25A0+centim
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c9fe2f5800e94b7dbf78fdecd968d284.pdf
    • https://static.usrfiles.com/ugd/5de1df_8cde36f1fdbd4bef9a395d046487e183.pdf
    • https://static.usrfiles.com/ugd/ee6770_52ea425859ac433480daab668c7986fe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/11987498768.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/80003516318.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/jesefurofegapunikagim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/adosphere_1_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5766/files/7539732370.pdf
    • https://cdn.shopify.com/s/files/1/0463/1383/2613/files/kaspersky_antivirus_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/toganutiwoxojakisomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/rovox.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/62780299771.pdf
    • https://cdn.shopify.com/s/files/1/0440/1001/2837/files/alzheimer_disease.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5398/files/nasisinepidibuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4224/9621/files/80423918094.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_off00004648.bin
ace48b2ce5a7937fffe6c07a5f1893bcec8846825aab3faf50a992b1ed3042c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4648 5860 bytes
font_01_sfnt_off00005a14.bin
07b15d37af59c8c9cea56b791244e6e7acd19164210f7ec5955b46fa7761d0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A14 11188 bytes

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