Malicious PDF — malware analysis report

Static analysis result for SHA-256 9229ffe915d68397…

MALICIOUS

PDF

44.2 KB Created: 2020-09-04 02:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b69bc74a2164a8416b790475003ae1 SHA-1: 535112adddc12e6bd1154e3e20297137d8cad457 SHA-256: 9229ffe915d68397f0df4014126e79736d7ccba56b59d199c53ce483801663ea
154 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, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=cast+away+2000+movie', is designed to lure users to malicious infrastructure. The PDF also contains a large number of links to Shopify, likely as part of a link farm to improve SEO for malicious content. 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.me/wix?keyword=cast+away+2000+movie
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/perelar.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/discuss_multilingualism_as_a_resource.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/singular_and_plural_noun_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/ligne_11_aix_en_bus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8473/4883/files/star_wars_theme_song_trombone_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/55557716914.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/6471576837.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/25979674868.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/rimepimupanaretetipinipil.pdf
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/bruice_organic_chemistry_7th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/70237367600.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006123.bin
adf3fa387f856eba8c85fe7f524965ca117e4c3c7fb5c2e7d2024925ac670f80
pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 5136 bytes
font_01_sfnt_off00007298.bin
cc9d53a43f57989290f6fddb7079c42a0e3fe6a0bfb4ef9d100b1c3424532468
pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 3408 bytes
font_02_sfnt_off00007fe8.bin
c804b3bd55aeee631bb0e67283f2f97e96ac4bb5b143e3474c0d75de7f06d8e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 10684 bytes