Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f82ca7821fcbcd…

MALICIOUS

PDF

44.1 KB Created: 2020-09-03 18:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef53a409e50b2ce51731a1f5caeacee6 SHA-1: e3fcaeacc41044e590c6cec775d94ba1ab5710ce SHA-256: 96f82ca7821fcbcd6986b23d8e8195b0c9463c291bd083375382b952facd5b37
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.club'. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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.club/wix?keyword=grammar+english+basic+pdf
    • https://static.usrfiles.com/ugd/ca9b0a_47ba27e6f0444ad685daa1773877c081.pdf
    • https://static.usrfiles.com/ugd/b8c837_31172dcbeb5d4193aef97bb399fac0c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_132eb013f89043e59db09a7000f93195.pdf
    • https://static.usrfiles.com/ugd/b8c837_d76629d369bc40dd973407bb27a7a1a9.pdf
    • https://static.usrfiles.com/ugd/d31907_8d396baeb56441e180fa51c23d929e93.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/91981883124.pdf
    • https://cdn.shopify.com/s/files/1/0462/6255/0679/files/tipos_de_equipo_de_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/18924418446.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/17836437070.pdf
    • https://static.usrfiles.com/ugd/ef7b09_c46107b0d93443a7b07f1588d782f52e.pdf
    • https://static.usrfiles.com/ugd/66c878_352f317974dc46eaa34f271c0113f901.pdf
    • https://static.usrfiles.com/ugd/ecec20_c8340b4c43cb4ba8b62d53e5021208ab.pdf
    • https://static.usrfiles.com/ugd/3254bf_4e526146c0b84a4fa65e53b2f086553c.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/69439114012.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/naruto_minecraft_server.pdf
    • https://cdn.shopify.com/s/files/1/0463/2438/3904/files/australian_accent_pronunciation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9308/9692/files/83514967632.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/40733103052.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_off00006d53.bin
a8b2ac7623b8b24feefe0e77b18c1f026d806770e7ffcde7f86f15afc5c1c188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 5740 bytes
font_01_sfnt_off000080b1.bin
46c6b4f7d9e39afe164a1ca75b977165eb7c0be4784027bc1661a938c068d45a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.