Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15ce57e463fc6d7…

MALICIOUS

PDF

42.0 KB Created: 2020-09-02 03:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c4e587ff9963b355921db03b06c79e2 SHA-1: d70d8b9cd47d405e5fae8ff4ee6a8644daad5df7 SHA-256: f15ce57e463fc6d782a5a122638b56d7ba3128c7d6145582cae96fd1571e9f03
208 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 User Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a lure consistent with ClickFix social engineering attacks, instructing the user to copy and paste commands into a terminal. It also includes a link to a redirector, 'https://ttraff.cc/pify?keyword=windows+10+feature+update+1803+iso', which is flagged as malicious. The document body, though heavily obfuscated, contains references to URLs and appears to be designed to trick the user into downloading and executing a malicious payload disguised as a software update.

Heuristics 6

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=windows+10+feature+update+1803+iso
    • https://static.usrfiles.com/ugd/f09a9d_87856fc81dbc42e6a94d9076f5c2eaf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd64db1a1dd4bea9a86ba8fa6f27868.pdf
    • https://static.usrfiles.com/ugd/45fd81_c1bdee8c572747b5af509ded7fe2fec9.pdf
    • https://static.usrfiles.com/ugd/2ac701_e37dd37af3ce44f1a9a9d6824950ad37.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/99419572761.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/kogepuwipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/44132866621.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dada1dcff33497a9e03ed2b0f4820b9.pdf
    • https://static.usrfiles.com/ugd/71fd01_ddcd3600c9d442c69b67a48663557aa8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d6ac805ccef4705aeed88c6bf67e36f.pdf
    • https://static.usrfiles.com/ugd/d5d855_aa2f4632f9ae48ab997b5513f79c7df1.pdf
    • https://static.usrfiles.com/ugd/b8c837_78649abb3d80431f8a9bf0224a081a4f.pdf
    • https://static.usrfiles.com/ugd/538d67_777d63d1690a41808a5b5e5d749314a1.pdf
    • https://static.usrfiles.com/ugd/4f270c_0ed88545663949d39a8b0084735acb67.pdf
    • https://static.usrfiles.com/ugd/a72fa8_ce4b713797d0468d8fbce1374d5f6a1f.pdf
    • https://static.usrfiles.com/ugd/30e015_3d2b44594ac6412184b6795cb0f5f09c.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_off000063ef.bin
187f30482b12304b6553446aed7c7b3955599b1e4299d044fcb9ef6510d36b97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 5660 bytes
font_01_sfnt_off00007766.bin
4fcaae072d4b38c099eeb847ac222e1fae23929cee736baeb3918c4d66468a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 10484 bytes

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