Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76f5713abd0620b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 10:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc9aa726dfcdad8df7f0596c4c8b2b1c SHA-1: 2c83864c30e4ce6e2ad6468383fa4ba3f792de46 SHA-256: e76f5713abd0620b6449345e59be697840ee7f68e55b37d2a0c94681cdea7168
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though heavily corrupted, contains the phrase 'Between the sheets drink' and the URL 'https://ttraff.cc/wix?keyword=between+the+sheets+drink', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious.

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.cc/wix?keyword=between+the+sheets+drink
    • https://static.usrfiles.com/ugd/b42fd6_c091290a208f46d8b8c893c13f0d8438.pdf
    • https://static.usrfiles.com/ugd/a298ce_c68138696bb7412bb130dae37802cbf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee6f529c0dcb41f9892dc280e11dc455.pdf
    • https://static.usrfiles.com/ugd/b4a829_0bcd2bdd34a849b7b99dcb82fc7ea4cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e26cb02dabca4e318de8f915af2fbb92.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/vafajutuwenowaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/90574449840.pdf
    • https://cdn.shopify.com/s/files/1/0459/7897/6423/files/kuvagenuruwizobideg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/57543962237.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/anabolismo_de_aminoacidos.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2dee4742844a929bfc208d5f93cb2a.pdf
    • https://static.usrfiles.com/ugd/73cb9e_4382b7d289de410590e65b74e03e85aa.pdf
    • https://static.usrfiles.com/ugd/7f46b5_0f6dfaba2dfb4bad9d0ea097047b50ca.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_65ed03f735ae4fefaabe62aa76f04e32.pdf
    • https://static.usrfiles.com/ugd/696b8a_60d0dbc0b5d04b4ab96f9e025e46737a.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c4eed335fd642a4af7c3d861c14881c.pdf
    • https://static.usrfiles.com/ugd/b0b521_d64e7fb1b00447778957c448c7925136.pdf
    • https://static.usrfiles.com/ugd/724bd4_c4b1a0a3fe794e9f89505bd04a5e71df.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_63f39c6ab269458a9dc13e1e2c281ce7.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b7c7b173fe41feac66e8bff6e4ed9c.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_off0000669b.bin
c179957f61390df361b3079d13f35de0da6553494c75f31728d31a8780304592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 4876 bytes
font_01_sfnt_off0000773c.bin
332e59631d1b33959b5a3f7e3378c8ffb074d8a3362d103a99d5d677845484d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 10172 bytes

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