Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4703ccd3feeb60…

MALICIOUS

PDF

33.0 KB Created: 2020-08-30 03:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc14bd7f9493d50dd290cc1d3c72adb1 SHA-1: e2f89a9bc5dec2f2d25bfcd403530160fdd276a5 SHA-256: fa4703ccd3feeb6045b6517533c9a26fd3b24a22da13a4a8dabb191857721dc2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting a broad distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The primary malicious IOC is the ttraff.com URL, which is likely used to redirect users to a malicious site.

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=centroide+por+integracion
    • https://static.usrfiles.com/ugd/b8c837_a9d43ee10ba949a798850b22f119515a.pdf
    • https://static.usrfiles.com/ugd/b8c837_771bd48058614aebab9436fb5aa7caeb.pdf
    • https://static.usrfiles.com/ugd/1b8612_7d04788101ad4dd58592e9144f8dbbc1.pdf
    • https://static.usrfiles.com/ugd/565485_01fc219348f04f839d9895ba3fe16613.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/can_a_file_be_dangerous.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/pengertian_sanitary_landfill.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/54519860995.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/netflix_error_ui_122.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/monster_girl_encyclopedia_vol._1.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/29084226017.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/75072276914.pdf
    • https://static.usrfiles.com/ugd/7e6083_e4c5c1afa41a40e5b2609e90b90fbb44.pdf
    • https://static.usrfiles.com/ugd/b8c837_deb879493aa64324a0062f7b02f87ef8.pdf
    • https://static.usrfiles.com/ugd/b8c837_04244193227144738393786ac1a82aa0.pdf
    • https://static.usrfiles.com/ugd/87d215_ae144de964f74562b5ad41dbef2cbec5.pdf
    • https://static.usrfiles.com/ugd/b7306e_24e8ea03ca7f4dfe9f1f6b92b7ffec7e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a9.bin
2137ddd3f55449aaa2d328dffef1700bf167db446b7e3c2af5154b6cbb6f368a
pdf-font-stream PDF embedded font (sfnt) at offset 0x47A9 4936 bytes
font_01_sfnt_off0000587d.bin
6e0c45c81cca6cfdce9d5a218ed01130e6bb052035253a22c302b6a733e23f14
pdf-font-stream PDF embedded font (sfnt) at offset 0x587D 9440 bytes