Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f2d32fd0aab003…

MALICIOUS

PDF

39.3 KB Created: 2020-09-06 15:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13bab4e828bd93db0e6b2db04611f20e SHA-1: 13fcabe008a442e40d5005faf0166fc1393e5cf7 SHA-256: a4f2d32fd0aab003830e6636ed4ed7725b4767ff51e20423e502286d286bfae3
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically flagging a link to a known malicious redirector. The document body, though partially obfuscated, contains text related to opening templates and mentions a URL that aligns with the redirector heuristic. The presence of a 'Remote-support tool lure' heuristic suggests a social engineering pretext to encourage user interaction with the malicious link. The file is identified as a PDF, and the heuristics indicate it's designed to redirect users to potentially harmful content.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=open+outlook+template+from+access
    • https://cdn.shopify.com/s/files/1/0447/8697/4869/files/lima_barreto.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/24615794412.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/arduino_projects_for_ham_radio.pdf
    • https://static.usrfiles.com/ugd/3f0e57_777f35a06b3846e4b6fc70b15cbf0a90.pdf
    • https://static.usrfiles.com/ugd/3615fb_bdbe0a9fd8ff40fd9cabccd2c9e79bb2.pdf
    • https://static.usrfiles.com/ugd/cac9e4_1a245c4d0f2f4da196482f7379abe22f.pdf
    • https://static.usrfiles.com/ugd/23e9be_37d9b94540c0428180b483aa57217abf.pdf
    • https://static.usrfiles.com/ugd/cc03df_23f15b3673c640eaa8555a07a740f3f4.pdf
    • https://static.usrfiles.com/ugd/b91566_a54541e6ee114659889e4b9174c80de1.pdf
    • https://static.usrfiles.com/ugd/a43ec6_2c8fe188340a439fb199ad430fde92cb.pdf
    • https://static.usrfiles.com/ugd/197ed4_24abb2d485f34c2ba95e8d29228f6b6c.pdf
    • https://static.usrfiles.com/ugd/38bf1f_d504abe601574e889a35336255c67fd2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/ambidextrous_organisation.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/87695057184.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3691/files/dunelm_curtains_size_guide.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_off00005ccb.bin
0125e9f7a748d51d56829ac8ca34fc8f3237101eec7219b76ab5ccb0647219b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCB 5252 bytes
font_01_sfnt_off00006e8f.bin
1511e29c598cd2ba110b3b07e1be260051f217cc778e4756b92e58b2dcce265f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 9900 bytes