Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab65422973f1612d…

MALICIOUS

PDF

50.3 KB Created: 2020-08-17 00:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 745cdbe01f28e3a7471fb3f1905e02b6 SHA-1: d599301cbdca1a4c5a9c11d1f55677711f6c0e28 SHA-256: ab65422973f1612d1d5da8c50601bc79b1e66600d9e77f1bf9d747dfcb0d3315
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is further associated with a link farm strategy. The document also contains a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. The presence of a visual download button reinforces the deceptive nature of the document. The reconstructed URL from the document body is https://ttraff.com/pify?keyword=anselsdk64.+dll++pes+2019, which is a primary indicator of malicious intent.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/pify?keyword=anselsdk64.+dll++pes+2019
    • http://files.renewablehome.org/uploads/1/3/1/8/131856100/8295040.pdf
    • http://files.mungopowney.com/uploads/1/3/0/7/130775013/woxupajet-fisuvi-livivesate-pazejasoxidefox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/23512720061.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/zerotuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/37255267247.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/guvapiwuxumobup.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/parte_accidente_de_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/lejutulizenafuwivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4581/files/1341538978.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/46661413248.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/poxuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/powuzisovuriletekuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/6150601080.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/wadokowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/6761244341.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/gixuwoke.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_off00007a5b.bin
2fb52500d982de7306cdbd264e5c6a23cd63590eb46a05b45e59eaaf76eec0be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 5004 bytes
font_01_sfnt_off00008b67.bin
5e31d85e59ca5f3933240cf6a1e4785de866c2fd72305081db7b74acf439595e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 10036 bytes
font_02_sfnt_off0000adcd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADCD 4324 bytes

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