Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a60654bafaad03c…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 09:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66f32ed478fa6ce831f77e533c359936 SHA-1: d2252d94715ff929e3d50edef5efb3967132baa0 SHA-256: 6a60654bafaad03cb0ed90257aa69abc605270362479623459ccec3ebb528e82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'igcse physics revision worksheets pdf'. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=igcse+physics+revision+worksheets+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/fd3290_69820422a5604a83a5587cfe84846665.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e07668e1ce740638d2bf153e34a7753.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a694811ad564bd38b965194c57d12a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f8ef4fdabd7440c9452d65214075379.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc094715d9b24a4fb7148df98740b45c.pdf
    • https://static.usrfiles.com/ugd/b8c837_37ebca5215094a1cb1e566d6df96baff.pdf
    • https://static.usrfiles.com/ugd/3f4b99_d8b721a1916a48b6a9f611cd97239278.pdf
    • https://static.usrfiles.com/ugd/89c6ad_2df0a554590446368912cb111e00261a.pdf
    • https://static.usrfiles.com/ugd/314c35_07f033a97c354f01adccc31ffeca82fb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/magic_bullet_expres.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0358/files/26859139719.pdf
    • https://static.usrfiles.com/ugd/37321e_6d6891683f9641b783f4c8554d915295.pdf
    • https://static.usrfiles.com/ugd/b8c837_1068a86272d44ee79c5c33a8e5e7a9ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_c932625d6e78453ca8ecbc84a2ade8ea.pdf
    • https://static.usrfiles.com/ugd/8b49c6_8e6827a679d14e1490cdd86dc998e125.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_off000045a3.bin
656919b150221709bec3d9c671600b17f12bcd4400e9cb2914721f08a3ada17b
pdf-font-stream PDF embedded font (sfnt) at offset 0x45A3 5432 bytes
font_01_sfnt_off00005838.bin
47bd94e05cefe4e22fae9d26ee3f6c858c23195774679d4e934bab4f3798e16c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5838 10484 bytes