Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef896a110ef684e8…

MALICIOUS

PDF

53.3 KB Created: 2020-09-01 03:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fb05362611fca77c2e08c85e15e3724 SHA-1: e6a235cc7bd8feee81c9069b5b4f698cd5c67e7f SHA-256: ef896a110ef684e86acdc354b58501e3552189132ee42bb5f57eddc541f3c510
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=schizophrenia+research+author+guidelines'. The document body, though heavily obfuscated, appears to contain this URL and text related to 'Schizophrenia research author guidelines', suggesting a lure to trick users into clicking the malicious link. The file also exhibits characteristics of a link farm, with numerous embedded URLs.

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.com/wix?keyword=schizophrenia+research+author+guidelines
    • https://static.usrfiles.com/ugd/b8c837_759fa00d1b73406ab04d855dd876ea7d.pdf
    • https://static.usrfiles.com/ugd/ee4a13_7f3971a5cc054d9ca06968e0f64b46ce.pdf
    • https://static.usrfiles.com/ugd/4b874d_a59f78e8394241f795b63a0d0ad8c08a.pdf
    • https://static.usrfiles.com/ugd/b8c837_eedcbe1b79fb4250bed3d31a71959b16.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bb4fb37272b406da07ab29a57205220.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/ar_condicionado_portatil_comfee_9000_btus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/97370062669.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/kogezajowelixas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/bekiladepunojiwoxarij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/monokuma_theater_morse_code.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c44688fb1614e98a61eb30f5d19554f.pdf
    • https://static.usrfiles.com/ugd/4479ed_c0dec8edad744c9f9ef2d342445ebd3f.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/85158073887.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/mikizabel.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/sugamagamawetobeni.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/nopasulubo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/mozavelu.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_off00008306.bin
7a195b1c3742725632e53f4e04a5a18e8f10ce350390fcedad1fbbc7c15604c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8306 5368 bytes
font_01_sfnt_off0000952e.bin
6530a6c6a9368c05c62b83858c06439332642f6e0b3155ac548db00a36b07bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x952E 10816 bytes
font_02_sfnt_off0000b9a3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A3 4324 bytes