Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3e50c1c891dbd7…

MALICIOUS

PDF

34.8 KB Created: 2020-08-30 17:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a682edb23541709c6ef05ee509d5247e SHA-1: 880ccf281660d40dd1974144b862a1f64460cd72 SHA-256: 1f3e50c1c891dbd753b537946abdc29643818e456c1c06f56dcf2de35d75e89e
160 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, specifically for 'dragon quest monsters joker 3 english rom', which is a common lure for users seeking game ROMs. The primary malicious URL, https://ttraff.ru/wix?keyword=dragon+quest+monsters+joker+3+english+rom, is identified as a malicious redirector. The document also includes numerous links to PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. The presence of a 'Password-protected archive handoff' heuristic indicates that the document likely intends to trick the user into downloading a password-protected archive, which would typically contain the actual malware payload, thus bypassing gateway security.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/wix?keyword=dragon+quest+monsters+joker+3+english+rom
    • https://static.usrfiles.com/ugd/b8c837_1aaf8e732ebf43249cdee28f20905d00.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7ef624ea4c24ec9b07957656968102d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3812a23079d74b67bbe662700c4bc0bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d8c67967e934c16be67fbfbc3b00398.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/atlas_world_map_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/liver_cirrhosis_diet.pdf
    • https://static.usrfiles.com/ugd/b47706_4e0527e7349d497697aba902e1c493f1.pdf
    • https://static.usrfiles.com/ugd/eb6612_604deaad4cca4a7db4016c97dcb637f0.pdf
    • https://static.usrfiles.com/ugd/9b5f63_bea331d6fa374c6eb3fe029485e3e60f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a905ced1868b4c9397f96f1750eac592.pdf
    • https://static.usrfiles.com/ugd/b8c837_62ead4b5d7db4e8381977a53c9133e96.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cc918520b014589bc44b787b64cfde7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6263b47bbb844538963b7dc5bdffd8f1.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_off0000482c.bin
0e47e2fc60909c6257c16b86f1261ffc5e5ac6929cc10ddee4062efbbb93a8eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x482C 5528 bytes
font_01_sfnt_off00005ad3.bin
208bf2c46646da8fa5d2ca7590d636e1dd9c16eb5d9eb4ad372c2b7d45293c94
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD3 10424 bytes