Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff011b1efb263cc8…

MALICIOUS

PDF

49.8 KB Created: 2020-08-29 12:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5c6c2b5dbaf32af6a7a39dfe442466 SHA-1: 3f126d67103328cfcfa3a24e79b6a0f13a12d6b5 SHA-256: ff011b1efb263cc84c8bc07b673ab3d70ca2ca9cc33619b922f589009f748a1f
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, constituting a link farm. The primary malicious URL, 'https://ttraff.cc/wix?keyword=current+issues+and+enduring+questions+sylvan+barnet', is a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of numerous links to external resources, including the malicious redirector, strongly suggests a phishing or social engineering attempt to lure users to malicious sites.

Heuristics 3

  • 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.
  • 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=current+issues+and+enduring+questions+sylvan+barnet
    • https://static.usrfiles.com/ugd/b8c837_40f6f4ca71f74898a515a2598ec36831.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ed6d31234ea5a6c78f6d21b6cf85.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d717c555f134249bce862f49eaed3ef.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/87438295292.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/45299404664.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f0770933eb84f02b7e5686906e87408.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a42f47445e48849989b37a702e4ada.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e2655208fb9443ebaab11851cd59095.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22cdb9f5e104815a60ba5cfedbbd167.pdf
    • https://cdn.shopify.com/s/files/1/0436/1152/1181/files/rubik_s_cube_pll.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/possessive_adjective_and_possessive_pronoun_exercise_pdf.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_off0000754c.bin
cf2005d5b4a64c68387677e2ac42930be851a6adf232070139e63e3084510d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 5324 bytes
font_01_sfnt_off0000876a.bin
66a0ef52913f8516e7d5d609ee0a3dcb56107ee71126b5a3ed851e05ca34121c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876A 10708 bytes
font_02_sfnt_off0000aba0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA0 4324 bytes

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