Malicious PDF — malware analysis report

Static analysis result for SHA-256 258a9c10fe3392d4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 13:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d353801ff7e594815b0d36f9c674aaed SHA-1: 787972c97ad0ec90ff63e80d5508994216e65dcd SHA-256: 258a9c10fe3392d4e9e0bf49c216c56e723df193a4fe069c462239c7aac01325
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=test+de+zavic+manual'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to PDFs hosted on Shopify and static.usrfiles.com. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a visual download button lure further supports a malicious intent to trick the user into clicking the link.

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.cc/wix?keyword=test+de+zavic+manual
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/94803989297.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/bulalemipiguvufakavoged.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/benumof_and_hagberg_s_airway_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/0562/3972/files/5033879242.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/56439750989.pdf
    • https://static.usrfiles.com/ugd/b8c837_c47e920139394044935331e50718e849.pdf
    • https://static.usrfiles.com/ugd/01e791_916eb6d4557a4cfa88124d6e9df284a2.pdf
    • https://static.usrfiles.com/ugd/04e6f9_2f5f69d9039448e1a208960588dd5841.pdf
    • https://static.usrfiles.com/ugd/b8c837_4090fcf43e6a42b4878bfa469eef41a1.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_85b885f47c2340cea01351b191fa26a9.pdf
    • https://static.usrfiles.com/ugd/590778_a9c3f49e5ce0402e8df2e2aa17004765.pdf
    • https://static.usrfiles.com/ugd/ab63e3_f113107b51c74985b4d0795dda925715.pdf
    • https://static.usrfiles.com/ugd/b8c837_4263e917e5ab430bbce7e8548f6d2abe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9411/files/26450042543.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/42632611476.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_off0000604f.bin
b15a247385fce805fd65d13b102d1bececb91efacf0357272bc47745bfb40d6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x604F 5048 bytes
font_01_sfnt_off0000717a.bin
56ac335650da1434774b26b83752f6a7c80e8bdf8cc0b0a1cbc79b303b507544
pdf-font-stream PDF embedded font (sfnt) at offset 0x717A 13592 bytes