Malicious PDF — malware analysis report

Static analysis result for SHA-256 9134680ca9997485…

MALICIOUS

PDF

53.7 KB Created: 2020-09-07 03:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa6e6ac5b455d9bb00bfa82e0c4704b4 SHA-1: 8098a7c33d0a1667688894a7a0db862e8032a3ca SHA-256: 9134680ca99974852d65550ebaba9164ab95d6fc03e83a14c09a24fbeb6c607d
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.club, which is disguised with a keyword related to medication. The document body and embedded artifacts are heavily obfuscated, but the primary heuristic indicates a malicious redirector link. The file also contains a large number of external PDF links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=metformina+500+mg+farmacia+guadalajara
    • https://static.usrfiles.com/ugd/5e8de6_0e68202ecc3a45c8bfacbc484b80651d.pdf
    • https://static.usrfiles.com/ugd/c34aa9_9c3597273c0b46c2b346949560c5342a.pdf
    • https://static.usrfiles.com/ugd/68ec51_d8983bbbcf8c4bbcb97a0cb49fbef63e.pdf
    • https://static.usrfiles.com/ugd/9f06f8_45ab69414f744b519fe7bedf327e6f8d.pdf
    • https://cdn.shopify.com/s/files/1/0432/2076/2783/files/rokowukujikifusibara.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/zijevutakobid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/best_app_linux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/wazomazegoretufimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/34114735449.pdf
    • https://cdn.shopify.com/s/files/1/0439/2629/0587/files/gurab.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/ciencias_naturales_sexto_grado.pdf
    • https://static.usrfiles.com/ugd/e3c460_ec3d30d09f9744428b3a5e4e2e330326.pdf
    • https://static.usrfiles.com/ugd/0baf77_1de7606b74874212a2bb774f204df1fe.pdf
    • https://static.usrfiles.com/ugd/8c2e83_0f4a6d8a7d2e46f8b4685f80ca8caaa5.pdf
    • https://static.usrfiles.com/ugd/9f69bd_8a9ea14e9f7c45a9bfbfe69aff1100e2.pdf
    • https://static.usrfiles.com/ugd/81ef4b_b96643b6a7824c3c83955db2462347e9.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e27.bin
787bda06a411bc6c931e6cd75f73a8dccf33076b717ccb09b5b6da5e94da9c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5508 bytes
font_01_sfnt_off000080de.bin
6988cde3f0d7c89b3e613ce7db8282f735c1f153ab30bacede735be7778195a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 3132 bytes
font_02_sfnt_off00008e1c.bin
0486103928bb8dc66c53e09b4e853abcc8967561db54223d14723f427a2b1522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1C 10944 bytes
font_03_sfnt_off0000b390.bin
babf4c400110b85ccc4834f01f547d276ab6529d5bd6c420b4a75b420e9c42f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB390 16300 bytes

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