Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26734e212cf39cf…

MALICIOUS

PDF

35.8 KB Created: 2020-08-30 18:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 360c9a502f9b34fe89581d061cbc200c SHA-1: 8b9d4f3f2435340c9026cbc438d838cd690be7f3 SHA-256: e26734e212cf39cf96f038d962e20de8aac232a3c3583728e56a13e8215bc850
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 ML classifier also flagged this PDF as malicious. The presence of numerous links, including one pointing to `ttraff.com`, suggests a phishing or SEO spam campaign aimed at redirecting users to potentially harmful content.

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=alpha+males+tumblr
    • https://static.usrfiles.com/ugd/b8c837_84bbaa6a675a47808ba7cc0227446871.pdf
    • https://static.usrfiles.com/ugd/ea78e0_cc7d2fcc44ac4a8cbec665a65d1e4cee.pdf
    • https://static.usrfiles.com/ugd/b52961_72821a14dbfb42cbb4da9a3397617ff5.pdf
    • https://cdn.shopify.com/s/files/1/0436/8341/4169/files/juxuwiriw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/74510513376.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/microsoft_office_flyer_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/direpu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/gabugajam.pdf
    • https://cdn.shopify.com/s/files/1/0438/1969/6290/files/mike_murdock_laws.pdf
    • https://cdn.shopify.com/s/files/1/0446/6016/2713/files/glossaire_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/75472557265.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3982/files/mamusevanuvepel.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c91929b26ac4a369e61d35d2d485e70.pdf
    • https://static.usrfiles.com/ugd/cf14a4_90a0280000324653888cdd9f796b769d.pdf
    • https://static.usrfiles.com/ugd/b6edda_a8bf5b93263d43d9b798e6d0794cd850.pdf
    • https://static.usrfiles.com/ugd/b8c837_6902fd47bee947a9aeb8e43c9f1216b1.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_off00004fee.bin
4804e6ca6c6ea857790c41475a316cc32ae2a92a26d9bbf1eafa2f3a0fa77664
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEE 5188 bytes
font_01_sfnt_off0000615f.bin
b1a2d138d94d4b82d29429f7afaa7b04267e88f487cb7f09c86daa3a54b9d226
pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 9800 bytes