Malicious PDF — malware analysis report

Static analysis result for SHA-256 87015905c352aaf3…

MALICIOUS

PDF

51.6 KB Created: 2020-08-13 05:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3582d535166b2d5769a15ec220322ffa SHA-1: b1af91f5ba93d86ad9c2cbdb88030e61c1d0dc97 SHA-256: 87015905c352aaf3c197eb945aeae0f2e5f5dd3f998551c71c73afa2301c8e54
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of links to benign-looking PDFs, likely for SEO manipulation. The document body and heuristics suggest a lure to install a PDF editor or browser update, which is a common social-engineering tactic. The primary malicious URL identified is https://ttraff.cc/wb?keyword=pdf%20editor%20download%20windows%2010, which is linked to a redirector.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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/wb?keyword=pdf%20editor%20download%20windows%2010
    • http://files.poconohydrofarm.com/uploads/1/3/0/9/130969435/91eaeb76609.pdf
    • http://gimopabu.shoplg.net/uploads/1/3/1/4/131482952/foxibujaf.pdf
    • http://files.hope.cr/uploads/1/3/1/3/131381706/9337376.pdf
    • http://files.ctslouisstlaurent.com/uploads/1/3/0/8/130814288/zagasigemis.pdf
    • http://files.barronparkpreschool.com/uploads/1/3/2/6/132682090/96710796.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/act_2020_20_test_dates.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/51190888834.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1519/files/new_paris_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/jabefuzinusoronabedikar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/86311659811.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/zapumibijimatus.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/23508359505.pdf
    • https://cdn.shopify.com/s/files/1/0434/7209/3336/files/86439096731.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/33714953874.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/75930044197.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_off00008c63.bin
97bb91483c8cefeb3095e21d50f28130285738a46db598fea63285ba79cde70b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C63 5188 bytes
font_01_sfnt_off00009e26.bin
49034f27eac599a5b544bce1293f0f873cc3d60b39bae10b31fec9361af39f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E26 10376 bytes

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