Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd01f38ec74e0d21…

MALICIOUS

PDF

52.3 KB Created: 2020-08-30 13:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d68986493390a13c3fa1e2999fc0fb56 SHA-1: 88530f53756f1816e8311e6311d1df72b93aaff3 SHA-256: fd01f38ec74e0d2132a9a9e00a73cc2bd2a1c2f379d320e51ff7c005c76dde64
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL and appears to be a lure for 'Amulet book 1 pdf'. The presence of numerous other benign-looking PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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=amulet+book+1+pdf
    • https://static.usrfiles.com/ugd/b8c837_ab4ee2da73eb4312bf501c91e8755d75.pdf
    • https://static.usrfiles.com/ugd/a43ec6_687e4fa0409c4008b569ae327463e192.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb3b2affd0d54926af29c3c74cd786f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e334b50ff0814d4296a42551ef71dad4.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_e18463f9bca64f6db20bb9379e33315a.pdf
    • https://static.usrfiles.com/ugd/8de238_ade707d23e4f492ba01da48f275f4f8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_48c2beab1041409d995305325d86014d.pdf
    • https://static.usrfiles.com/ugd/2ac701_2b706e78929d4d38b86fa0c4f9162c44.pdf
    • https://static.usrfiles.com/ugd/a107db_f82c85d68c8244d4ad74a92e56e00761.pdf
    • https://static.usrfiles.com/ugd/b8c837_774e34e6324e41a6bbdb3a5d74b2e37a.pdf
    • https://static.usrfiles.com/ugd/fbccce_c62d3e49a19a42a8a050cb76c2c22dc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_3747a899bcf04340a272ee1d411db89a.pdf
    • https://static.usrfiles.com/ugd/b8c837_44604c79e513478e88e00f99254ec125.pdf
    • https://static.usrfiles.com/ugd/b8c837_80390e738f7b4cc19f5fc7b7833ebd44.pdf
    • https://static.usrfiles.com/ugd/136d07_2f1eb70856614cb0bf07fcf37f174da6.pdf
    • https://static.usrfiles.com/ugd/ce5d00_da8e51d1522f46f690b4f1743271e586.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_off00009206.bin
80eefa9e361fa7203398bd24593194581a541561d87c58d51473d47574a2e2f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9206 4948 bytes
font_01_sfnt_off0000a2d0.bin
a325bd916f8b5193e9d9e7ccb6122245e943b12783f038ca21e9cf5ae03cd9a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D0 9944 bytes