Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daa99ef5cc36380…

MALICIOUS

PDF

95.6 KB Created: 2020-09-08 04:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad9d09cf4a47c386bfb71ff515008985 SHA-1: fecb30d654d93435fb90cd461b36a62b1fb72b5f SHA-256: 3daa99ef5cc3638077ddaaa3a92196e2f253fd96d5f788d7557f01f77dd23eac
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, identified as 'ttraff.club', which is likely used to host phishing content or distribute malware. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a callback phishing or tech-support scam pretext. The presence of numerous other links to PDF files hosted on 'static.usrfiles.com' and 'cdn.shopify.com' indicates a link farm designed to improve search engine ranking for malicious lures.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=idect+phone+answer+machine+not+working
    • https://static.usrfiles.com/ugd/c33cdb_893c033000524da19c68e00d33b31bb1.pdf
    • https://static.usrfiles.com/ugd/9eb187_327cd30a9a5c477e908ab0fef16f1006.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0a240b999dd4962a9aaa97d70bbd310.pdf
    • https://static.usrfiles.com/ugd/b8c837_855710d6f7a044dc85e388ae32782f77.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/9171913694.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/43612045397.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/adobe_reader_free_download_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0435/8556/8925/files/26071277034.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/xetadi.pdf
    • https://static.usrfiles.com/ugd/185811_1190a998c2684e959e80621246f22c07.pdf
    • https://static.usrfiles.com/ugd/5b9365_f83f9fee7fc746af90f630ee067beb1b.pdf
    • https://static.usrfiles.com/ugd/f99735_bfecb2b933434c2f9c31c0b30bbc483f.pdf
    • https://static.usrfiles.com/ugd/dcbeda_d763fae4881d4f809fbb411915299316.pdf
    • https://static.usrfiles.com/ugd/17beed_15551c165b8b4f74b9782c4c64c76741.pdf
    • https://static.usrfiles.com/ugd/7dd30d_405186a931c34389bf884124fd44052c.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b8e7b476734cdd85e02ed1c7314eeb.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_off000130d5.bin
f5ab1cc6590d2b48db5c20d7399a98c20bc8973ffe2fd4d7f7fdc573404c3cb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D5 5548 bytes
font_01_sfnt_off0001439d.bin
cf8559f76c814c9d33ddc6573cfff2ebc8ce7e1ecc879422873d9a186f1fbb0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 15104 bytes