Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a6a9dbcc0a67a8…

MALICIOUS

PDF

64.7 KB Created: 2020-08-31 22:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89027d68e6e4aba51cb9bdeaf5bcac2f SHA-1: eea5dcbe92962629ef8dcfc61c7995e83d390b73 SHA-256: e4a6a9dbcc0a67a87659815c6ac9a54e9b35e6183b911361bd41fab1ce30b061
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=certificado+medico+ejemplo+pdf'. This URL is presented within the document body, disguised as a medical certificate example, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which are benign but likely serve to obscure the malicious one. No scripts were extracted from this sample.

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=certificado+medico+ejemplo+pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/keto_diet_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/dyce_primary_school_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/kowipe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/3177718419.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/56194271130.pdf
    • https://static.usrfiles.com/ugd/c0b427_5afb312bedba43e4b770ba09985346fb.pdf
    • https://static.usrfiles.com/ugd/11f207_331b6225f96f439a9d9ce6d2395170c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da63428f93e4d8aa7d384ada091b80b.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b9d9deb186495c844334894d34d319.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfe4b25bd3ae4f6299dd6680bcdcd65b.pdf
    • https://static.usrfiles.com/ugd/d4579c_ef297a2f19344175b2d015e9eff613f6.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_db6a8e9354d64a1493997f0aaf5e9f5d.pdf
    • https://static.usrfiles.com/ugd/67e251_aa584a7a45a8422c871f8b65ec47d850.pdf
    • https://static.usrfiles.com/ugd/b8c837_277be9e0bb5047dc8b8d9105d319aac5.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/98082867112.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/xufobexotixarata.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
stream_005_off0000d579.bin
f20acd2255b06130716163df09eccff52c92b9c9216a4a4faa18f3592c4c0194
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD579 19060 bytes
font_00_sfnt_off00009e49.bin
a7c8c50b37d9561dfb3a73ba1ab24938dcdd0045cea3182f9f0885deb7f556c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E49 5104 bytes
font_01_sfnt_off0000af91.bin
0e75e1ecb86c87eaa0a219e1a1536a629a9f5c48aa23bf0f847454100d3416a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF91 11600 bytes