Malicious PDF — malware analysis report

Static analysis result for SHA-256 07213bbe16171412…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 21:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a82e6b144e15bae6af3b5ec75307a91 SHA-1: 1e65cbef37dc08acb5ebee13bd4869bcb12d78f0 SHA-256: 07213bbe161714123eec29f21538dc5b46d9664841245293cce43b724f1fdbe4
154 Risk Score

Malware Insights

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

The PDF contains a link farm of 30 external PDF links, with one pointing to a known malicious redirector. The document body also contains the malicious URL, suggesting an attempt to direct users to potentially harmful content. While no scripts were extracted, the presence of a malicious redirector and a large number of external links indicates a high likelihood of malicious intent, possibly for SEO manipulation or to host further malware.

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.ru/wix?keyword=alto+vs+tenor+sax
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/tafsir_surah_abasa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/capitalisme_industriel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/misipegekinevaresevatano.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/92854242654.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/dia_do_campons_boliviano_e_a_reform.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/heath_scientific_computing_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/bamthathile_amapiano_remix.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/57731432757.pdf
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/matrix_multiplication_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/bolidirug.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/banished_start_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/types_of_enzyme_catalysis.pdf
    • https://static.usrfiles.com/ugd/38bf1f_326c374f278d49109c5f40eadb3d15b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ca8703a607c41c7a4bd67076a8dcb10.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcf3dfdbe8d142f7a2f21ac2f973041f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a870ca16a0a54b08a50e02f673722e8d.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_off00006c84.bin
a338e8b4763e98973a48ec5d18cd5807e10d4909520bfbd2efc398a45fdea0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C84 4796 bytes
font_01_sfnt_off00007ce4.bin
bdebe2e5885fea3ec6d8eab1b3a017e4c34d0609eec1aaeaedcec0622fbce95f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE4 10132 bytes

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