Malicious PDF — malware analysis report

Static analysis result for SHA-256 71230da6d4906d00…

MALICIOUS

PDF

45.0 KB Created: 2020-09-07 04:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 91f0902162477f956ed1a2c3882b18a2 SHA-1: bfc224be1987d01349d845e3424fd7933ec61cbf SHA-256: 71230da6d4906d00e94a0fb933b3b347b7460650276ba7474ccafd3a6be2f398
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/wix?keyword=best+brochure+maker+app+for+android, which is likely used to lure victims. The document's structure and the presence of numerous links suggest a tactic to obscure malicious intent and potentially engage in SEO poisoning to attract unsuspecting users.

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=best+brochure+maker+app+for+android In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e2f7e1_8214861d804643e297090e0e30e316d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6c98bc_4b6e2ab87bb949b9b85cf9e5a9f55ba3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8de238_6dc57ee55ed54ffab2a9466fc4dc634b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_89a15ef2bbdf4668aa61d531536b533c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/11276f_a3991a5a00bf45b8a0030567c7079397.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ed902_fcabff9e17ff4eaa9753c8bead6333cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/122077_fabfd872e96e45b184d555c0b68f18ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6290de_5b7ed9de7b3c4d4d9332707cdfaf1b95.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4117a9_6959f6c561e14a21b4eebd6f0c99c025.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d2fda_20b21ace0f624484a47e183f4409f11f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8dde66_53dd1fa0dd1e431b898c7747d90c1943.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c90dc_c7a870ee7b4f4734b21160acf1a939f3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1649157441a143e9b41e4bcc65abc0a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bd5c68_c0d4d767a39d4c48828f045545e1ba0d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/17beed_b7d77c88e52943b9b8a1dfa50d5fe89d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9cfd0a_3c3a0db827be4c92ab292dc09512ce5d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/30e015_6abf320c5dcc487380b0cad936bb1d41.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 5616 bytes
SHA-256: 8c8e8844bbaab308bc9142fdb1ff59f1001d3e8d9f67d9339d5a14ce192bcdd9
font_01_sfnt_off000083e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 10152 bytes
SHA-256: 8448129c64e32d3b586524e191a2eb4ed8208e34f96e5e95b6f8ce6f3d0520d1

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