Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bee9f2167a9f5d8…

MALICIOUS

PDF

35.4 KB Created: 2020-09-09 16:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94557e3d53e89b573af4e7ee185d9b9d SHA-1: 77f58b9c35c4e86e3cf2c82a153d6f56c8c91788 SHA-256: 8bee9f2167a9f5d863a53674186c70c79928de12dade63f076215928f97bfd8e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.link/wix?keyword=lagu+balungan+kere+86+abah+lala`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including `http://files.choisnuts.com/uploads/1/3/2/7/132740214/ccc503857c25.pdf`. The document body, though heavily obfuscated, contains these URLs, suggesting the primary purpose is to lure the user to external, potentially malicious, content.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=lagu+balungan+kere+86+abah+lala
    • http://files.choisnuts.com/uploads/1/3/2/7/132740214/ccc503857c25.pdf
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdf
    • http://junep.littledarlingscookieco.com/uploads/1/3/1/4/131452838/xigisadosezimojes.pdf
    • https://cdn.shopify.com/s/files/1/0450/3132/5846/files/nakegufizovonebamigef.pdf
    • https://cdn.shopify.com/s/files/1/0436/6319/6310/files/kizakodujosaxufuxore.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/80691457327.pdf
    • https://static.usrfiles.com/ugd/98e2de_025f0cbe0792450f980f1bd354ff67b0.pdf
    • https://static.usrfiles.com/ugd/b18e4d_cffaa9e757e940af8ad6ca9252dac0b4.pdf
    • https://static.usrfiles.com/ugd/6290de_f318dc88a64f4ab19981b826e6d44490.pdf
    • https://static.usrfiles.com/ugd/72216b_a2cb2a56bd0b451ead6e3ec46b14c67d.pdf
    • https://static.usrfiles.com/ugd/3ed44c_8305827d96de467aa222942fb369809f.pdf
    • https://static.usrfiles.com/ugd/cfa91a_243b36f6c8234c9c9c48449d9a1deb30.pdf
    • https://static.usrfiles.com/ugd/e4f6f0_f46cd4a1f5e54c59998b6f38e29a1742.pdf
    • https://static.usrfiles.com/ugd/19103d_ca9d306277844c3f8d1d2aaab40c810a.pdf
    • https://static.usrfiles.com/ugd/89c6ad_734206d9790e430a8adfbc95b91a5406.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_off00004631.bin
285908d5fd6b370f4caa1c068e80b8213c53b935b90c20057f12f303a26b1860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4631 5260 bytes
font_01_sfnt_off00005818.bin
46d9289681342a78fb1128cf88e61b4191f79381d22c9a09b63933dc11273704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5818 12408 bytes

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