Malicious PDF — malware analysis report

Static analysis result for SHA-256 339910bf9edfb10f…

MALICIOUS

PDF

50.6 KB Created: 2020-08-31 14:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ed677a18841338c0e4eac392e088b5a SHA-1: f815df8c965ca38111064a9f67cb27d8e9fdbc17 SHA-256: 339910bf9edfb10f773d1afe845535eedaa3875f4fa68a10aaf4f7b61cfc0dd2
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL and references to other PDF files, suggesting a lure to external 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=email+signature+html+format
    • https://static.usrfiles.com/ugd/b8c837_acdce137a6184e7483d279e9b1650b8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_012c1a48c59c4d30b027a1d7a6c9ffdf.pdf
    • https://static.usrfiles.com/ugd/b4a829_8929da4a4f8d40bfbe440a1fc33c45e4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/sumuwapozig.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd283b680f7540edaa1e482e831b5bc9.pdf
    • https://static.usrfiles.com/ugd/409ca8_717436daba034059a177d925e0c80b1d.pdf
    • https://static.usrfiles.com/ugd/0047a4_d50c715e350149d2ba4681486a0c861f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c69a25be5569414c8ca8b10054670f96.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f73c7d0a84141f9b3453a32242d03eb.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_124dd31efc824cf58c1fc290c1ddc9c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b9270f295854ca2850a45c6260834a3.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_off00008078.bin
ac0440f262e7d945ae35c8252f2951594ce58015b727e719ab66275711be4f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8078 5140 bytes
font_01_sfnt_off000091c4.bin
75b131bc7566e33751776ffc79c48ea66e06b10796578e977853d23a2eaab833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C4 13560 bytes

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