Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac507420ac4c717f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 17:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0213a60712b0bf4850c2936ca4f054d8 SHA-1: 2ebdbbc09d7073ef0aa1e7c3eed7a1170dcdf91b SHA-256: ac507420ac4c717f159ef5a4197631d662330fa9fc60b40c518aca567e9b4c54
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.com/wix?keyword=leantween+vs+dotween. While no scripts were extracted, the PDF structure and heuristics strongly indicate a malicious intent to redirect users or engage in SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=leantween+vs+dotween
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/asurion_affidavit_att.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/dmv_dublin_pa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/zimikebotixegovab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/3173058277.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cf667b027d048ed83fedcfa84e3f7d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbecc9a1d58c46e9b45e70e6f34fd5c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a0647911b0d47e5a14ad61988378200.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/gazawoxalepawodokiduz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/apprendre_piano_sans_solfege.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/bofimejevipafibafamub.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c76.bin
587c67754c5dd648ec11a337818eb8512cca7d3f82e3425881507b9fbc3f8380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76 4784 bytes
font_01_sfnt_off00006ce1.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 1800 bytes
font_02_sfnt_off0000756f.bin
b3b6c33034901de6bd4b8578189e077a30312a94676ca2fc00a6f7740087de91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756F 10668 bytes

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