Malicious PDF — malware analysis report

Static analysis result for SHA-256 c128b4e88ddd5bff…

MALICIOUS

PDF

42.7 KB Created: 2020-09-03 20:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6bc2a6ff708ee03a5d9ae8afe73ae20 SHA-1: 3b40495c3830d17646db6260ea7df96d3c067483 SHA-256: c128b4e88ddd5bffeb88b86ea595d51a830bee62e04c68b9c64d5b8458c90a83
178 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a lure for a browser extension installation and a visual download button, combined with urgency language. It links to a known malicious redirector, which is a strong indicator of a phishing or malware delivery attempt. The document body also contains a high number of links to external PDFs, many hosted on Shopify, suggesting a link farm designed to improve search engine ranking for malicious content.

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=quantum+resonance+magnetic+analyzer+setup+free
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/cells_vba_excel_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/fisapusufezifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/nupinaderaxidumenogini.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/nys_45_forms.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/fixoditufivebew.pdf
    • https://cdn.shopify.com/s/files/1/0436/9448/9755/files/42627711660.pdf
    • https://static.usrfiles.com/ugd/fe83c3_4d77c6b06c3f470da74b0719d6320211.pdf
    • https://static.usrfiles.com/ugd/0c41e7_1badf65d1b814b5dbdf6f43cbe4aa506.pdf
    • https://static.usrfiles.com/ugd/3225da_45c58eaf1a564ce89601df974e363c6f.pdf
    • https://static.usrfiles.com/ugd/f3cb45_b024dd5e29c34a5dbca03ee7f9b228e7.pdf
    • https://static.usrfiles.com/ugd/957c7b_6ef793bf6351440db3ae37284fe6ee72.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb5058c29704033828765542c911985.pdf
    • https://static.usrfiles.com/ugd/dbbfd0_8cb99d41584b44da9d3734a8bce1f636.pdf
    • https://static.usrfiles.com/ugd/b8c837_d424ac2844b1474390a801dd8b290f2a.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_off000066c0.bin
12bb8b9bc19ffb3867bedfbb07685e35d7c1fa7f9b9b76115940c8aaa729e252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 5548 bytes
font_01_sfnt_off00007997.bin
8e7060d091465f22b9338520be475bb084d545ad8aa15131fbb11caeef13e9ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7997 10740 bytes

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