Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f329956786cefe…

MALICIOUS

PDF

43.4 KB Created: 2020-09-01 08:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff224f75311a63c84e66141e13dc580a SHA-1: 5d8ad3964daac4dc8e41bda86b463427c40e6bfa SHA-256: 72f329956786cefe69f705830a6b2ce2b2266620c9597282dab90270fc3edb66
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=cecos+university+admission+form' and numerous other links to PDF files, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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=cecos+university+admission+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5ad03d_41d492206163423c8d36d883002253d5.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_fdf15f808d8049d2b2f3ee11a95dd3be.pdf
    • https://static.usrfiles.com/ugd/c6ac46_05e8dcfd17154668be482287e660dc32.pdf
    • https://static.usrfiles.com/ugd/efb3f0_29ca1f70d3fc4e1d9098e122ca7b2580.pdf
    • https://static.usrfiles.com/ugd/b8c837_576b572585034db998e9fea34c285dc0.pdf
    • https://static.usrfiles.com/ugd/585b1d_31d5ace13d164ecebf3df1e1b55e07ed.pdf
    • https://static.usrfiles.com/ugd/db93e9_62946940e16d4cbdb4724dad3e8553e1.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/49333855457.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/7409497321.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/95789121253.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/fitidotim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/caporetto_alessandro_barbero.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8063/files/sap_bods_technical_manual_4._2.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/schopenhauer_the_world_as_will_and_representation_vol_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/estrada_de_santos_roberto_carlos_cif.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/nexetewexobapegipagiwepu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006175.bin
e1be4db2d115f7481239bf6b4293f322d8cba07e0e724236f3be61bbcc2a83f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 5204 bytes
font_01_sfnt_off0000731d.bin
04a08c219b999c837239d1a9d948771cf9e0d60d0f76b4483294b6c71d3d9a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731D 14340 bytes

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