Malicious PDF — malware analysis report

Static analysis result for SHA-256 853d76f9f7d2f2d3…

MALICIOUS

PDF

46.4 KB Created: 2020-08-29 22:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92f614ef404c1007d46300c0d0661059 SHA-1: db3b85789c5aeddeb118fc9a18f75393bca1cd81 SHA-256: 853d76f9f7d2f2d34110f1f85b88274c6b9ca637c3e1c64a7dfb8785e3f0991f
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text suggesting an invoice or academic-related lure. The primary malicious IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=linklaters+watson+glaser+pass+mark
    • https://cdn.shopify.com/s/files/1/0433/9364/6753/files/goketalisonoxedakega.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/14794852810.pdf
    • https://cdn.shopify.com/s/files/1/0463/1068/6882/files/pycharm_auto_format_line_length.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/unholy_death_knight_talent.pdf
    • https://static.usrfiles.com/ugd/af0aa9_70ab3ac65aff4d9fbda073c74b7e3dd3.pdf
    • https://static.usrfiles.com/ugd/df4650_994bb1c8de9b45cfada6e5551c0c230f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8757eb14730a476e9367d9f20568b7f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_49de9b72dd4b4994967c082c2c7f984e.pdf
    • https://static.usrfiles.com/ugd/4f270c_176244fe62fd4e3a9bc10429a82bd5f8.pdf
    • https://static.usrfiles.com/ugd/eda9ba_1cd321c53db140ed9d2fff8d7b4a241d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f806d6b041e149b5afb2ac51ffb36c52.pdf
    • https://static.usrfiles.com/ugd/b8c837_08cfc068c4024793bb29bb17f3ca2204.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/74149755448.pdf
    • https://cdn.shopify.com/s/files/1/0449/5409/1675/files/game_android_tekken_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/bulawayo_polytechnic_2020_intake.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_off000078ef.bin
4bab8b584ab19f95ca0aff8bb41cee428aaf6ca1b84a5bea5181cecc9c5db80b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 5236 bytes
font_01_sfnt_off00008ac0.bin
84edee5f899edac65b325ba0a12a316308dfa5b5b083c76d720d403497f80714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC0 9868 bytes

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