Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b6b7311f2f4cba…

MALICIOUS

PDF

45.8 KB Created: 2020-09-10 10:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23d04f9415afabfd6d8d1a3062722466 SHA-1: 3cb91267d0d703e2a56b15a1fe5cf6f0712d9db3 SHA-256: f9b6b7311f2f4cba4a586eb6a79732eda7a40194128d9cee0951a1d25c7eb303
182 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.club/wix?keyword=adblock+app+free'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external PDF files hosted on various domains. The document also contains a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for credential theft or malware installation. 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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=adblock+app+free
    • http://files.100firesmoto.com/uploads/1/3/1/6/131637881/2233720.pdf
    • http://files.jjeffreymesserole.com/uploads/1/3/1/3/131384018/f3faf9c41e.pdf
    • http://xewop.inspiredcreationsbysky.com/uploads/1/3/1/3/131381679/1613185.pdf
    • http://files.drawcollar.com/uploads/1/3/1/4/131438784/sujelaxakoze_jomot_borif_malagixer.pdf
    • http://files.nekitapilzphotography.com/uploads/1/3/0/7/130738771/boponadiwexupan.pdf
    • http://donafojaz.maverickwellnessboston.com/uploads/1/3/1/3/131380429/5c84d2e5d33592.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/10783872353.pdf
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/69234600009.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/82587466082.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/xivivexunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/40410575782.pdf
    • https://static.usrfiles.com/ugd/6da380_bc98bcfe16394d41900f613c8e2ba8ed.pdf
    • https://static.usrfiles.com/ugd/2c8d66_01c9c412005d43a6a996c86069e175ff.pdf
    • https://static.usrfiles.com/ugd/9d7ad9_4fcd998def4f483da0b28eceda95c089.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_off0000749b.bin
1c494d1ce55e3775c455572d3d8c6faa4cc1bb44eb7bd564c3f2e585450185c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x749B 5164 bytes
font_01_sfnt_off00008639.bin
03b80b769337a3456ee38f56f6c67120fa3c5f35e12fea8c023c05f250e107d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 10536 bytes