Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fffaa54e4bfcbc…

MALICIOUS

PDF

48.4 KB Created: 2020-08-30 19:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4b779d3b4431ca071b67cc75e1ae2a5 SHA-1: 99ed55ef8c7ec5b088642347dbf40ca655d619f4 SHA-256: 79fffaa54e4bfcbc9b90a88fbc32e9f43362e9212749af8a173407e18fb4798c
130 Risk Score

Malware Insights

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

The PDF was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to ttraff.com. Additionally, a PDF SEO link farm heuristic indicates the document contains numerous external links, with the primary one leading to a potentially malicious redirector. The document body contains the URL https://ttraff.com/wix?keyword=skyrim+nails+mod, which is likely part of a phishing or malware distribution scheme.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=skyrim+nails+mod
    • https://static.usrfiles.com/ugd/f65518_776ea530f32740fabd5f3541cab4c676.pdf
    • https://static.usrfiles.com/ugd/cc03df_3aba05443ab44d08a5b42f6581e40412.pdf
    • https://static.usrfiles.com/ugd/0286dd_172908dffe6a46548d46d0b36676640a.pdf
    • https://static.usrfiles.com/ugd/e5a943_0c7a61211262434cbaa74dbaa835d874.pdf
    • https://static.usrfiles.com/ugd/b8c837_603c1f8d26f5401094174002416790d5.pdf
    • https://static.usrfiles.com/ugd/5438e3_cb648856b9c94a10933fc17d13fac95d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.pdf
    • https://static.usrfiles.com/ugd/cc03df_76b073d0626d410fba5271a5d8fdb471.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/wovegaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/6957737941.pdf
    • https://static.usrfiles.com/ugd/98e298_5f657dfb6477485cb5e86efc8317e394.pdf
    • https://static.usrfiles.com/ugd/ec0c41_0eb6eda34c6046d6a1b8350c05b89a82.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_off000080de.bin
802a3276bc167204461c890edfeceb14b9026780aeca514ef4472dc6408d338b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 5240 bytes
font_01_sfnt_off00009293.bin
a54644b612ff801d546e4ca4e9e2bba62811574e5deb0e7771738f96679934c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9293 10236 bytes

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