Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4d730fc2cf423b…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 04:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e3a0b5dc873cca1a257e71ab1753de7 SHA-1: 8287cdab7dc98c898ebab4780de0d73753dc3780 SHA-256: cf4d730fc2cf423b387571b5701d34cf59eb0b654dcfcf587d3c2ff281ca010c
180 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body text and heuristic firings indicate a social engineering lure, specifically prompting the user to install a browser extension or update to view content. This leads to the malicious URL, suggesting an attempt to deliver a second-stage payload or phish for credentials. No scripts were extracted from this sample.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/wix?keyword=google+chrome+thumbnails+not+showing
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/these_hoes_for_everybody_khaotic_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/family_crest_runescape.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/halving_numbers_year_2_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/19237258715.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/1434579921.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/free_powerpoint_baby_shower_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/putimuxolegut.pdf
    • https://static.usrfiles.com/ugd/a1fb72_ec20edaec8254075bfddef63454c6f25.pdf
    • https://static.usrfiles.com/ugd/b8c837_88b9ef4220b64299b85ebb8981df6e3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_955a13aea1074fa1b367fd6c49cbe768.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1774ddf6d114eb98cce210ceae72023.pdf
    • https://static.usrfiles.com/ugd/e745be_ea58f170c494440bbd493f792ad9004e.pdf
    • https://static.usrfiles.com/ugd/b8c837_31ae5b9fda44486e9c06b3ae4c9525ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3e5f537821d40e59e50b0c2fc822bbe.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_off0000753f.bin
960971ef123d616b80f52b7ea7b4fc90ba63324eea32671b4e212cfdc80c21b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 5476 bytes
font_01_sfnt_off000087cf.bin
a937b64627fef61e2d0b1f3f6a78e38a91a2f8591242f8d1d86bc70edd7f603a
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CF 10756 bytes