Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b80d54ee6b107a4…

MALICIOUS

PDF

48.2 KB Created: 2020-09-09 23:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea6bdd21a496ee6e99831227d8d20982 SHA-1: 2e9988a34e44896880b7f4499ad55333392c2772 SHA-256: 8b80d54ee6b107a4c25ecfb30c6ba35f7ca545b29ab3426adb4f7ff204b6f0c8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.club/wix?keyword=mcafee+endpoint+security+web+control+product+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to a malicious site. The presence of numerous other links to external PDFs, many hosted on static.usrfiles.com, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final malicious destination.

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=mcafee+endpoint+security+web+control+product+guide
    • https://static.usrfiles.com/ugd/5ad03d_b99deaad2e8047f89ae1f8c2648c33af.pdf
    • https://static.usrfiles.com/ugd/2813e2_fb2d888c550a43bd9bbde4984ca05333.pdf
    • https://static.usrfiles.com/ugd/bc0b97_de49929ad7e9463684bf801954a71dae.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/18301281260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6252/files/platform_movie_all_video_song_hd.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/sevokajuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/84255893828.pdf
    • https://cdn.shopify.com/s/files/1/0457/8505/5398/files/aadat_song_by_sucha_yaar.pdf
    • https://static.usrfiles.com/ugd/739437_1eb23e485ce94529b0a7afae068bc980.pdf
    • https://static.usrfiles.com/ugd/595093_d9450e31113347d88af0660669f2028e.pdf
    • https://static.usrfiles.com/ugd/debdc1_f402a72f89fc456eadd8fb5d27a642e7.pdf
    • https://static.usrfiles.com/ugd/628a76_7891e43bcf74485ba7868d3909dbbace.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/xaduwawagokekisibem.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/zxbinstaller_3.2_descargar_1_link.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_off000076f3.bin
c2d5374564c3adb767668d76ba815ae3f0371ef4b9bcb843cdf00e2572dd1d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 5664 bytes
font_01_sfnt_off00008a6d.bin
b93dfb14b819644fbee9ed9821fbaa01fc30161260a093259be4db251d91d13d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 12744 bytes