Malicious PDF — malware analysis report

Static analysis result for SHA-256 057e34dff9dfae0c…

MALICIOUS

PDF

36.9 KB Created: 2020-08-30 11:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79677a28b8ecdbd77f9aaf01a9fc09d6 SHA-1: bea8b6c9c2e04a5471b6872be0b24621dbd46dc7 SHA-256: 057e34dff9dfae0cb99685eb6e36550f25cb49d8277971dc0fc561013835ff26
154 Risk Score

Malware Insights

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

The PDF contains a link farm with over 30 external PDF links, many of which point to shopify domains. One of the primary links, however, redirects to a known malicious domain, ttraff.com. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded links and the malicious redirector indicate a phishing or redirection attack vector.

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=lie+to+me+kore+dizisi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/6420770428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/divuz.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b29095131b647f2a26fc780a904d88b.pdf
    • https://static.usrfiles.com/ugd/a2d007_c1f897befd244cbdb1dab6ee73db223e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecca9774b4e14120a00f63ae7b267244.pdf
    • https://static.usrfiles.com/ugd/565485_fdb07c8f2d5d424dbfe17275563ae448.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/skb_ps_45_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/gibisunetimifapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/hidden_pictures_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/kijubasurogatazibanoz.pdf
    • https://static.usrfiles.com/ugd/f09a9d_395b0dc5146c409ca3de90bc2894b28d.pdf
    • https://static.usrfiles.com/ugd/0779a3_243e4887addc493884d08db652134f8c.pdf
    • https://static.usrfiles.com/ugd/d775a9_f4b605174e164fd8887731c6edd4066d.pdf
    • https://static.usrfiles.com/ugd/38bf1f_7bf41219d3fe49d3904cf14a3233a5d4.pdf
    • https://static.usrfiles.com/ugd/b80405_a255b1d5d65141c59e300d87e36cbdc5.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_off00004bd3.bin
dd58373a754c933a57e014adaf55564a053a4a664cd62e9e5242288691a5b344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD3 4784 bytes
font_01_sfnt_off00005c13.bin
f64ca80007e89bfc93a7b6c60414e7e867fbc33c7171c8442a7d24a5f487dd0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C13 13380 bytes

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