Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1991f729ec8ea4…

MALICIOUS

PDF

59.6 KB Created: 2020-08-21 15:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68cdb01e51cb5fff92bc6dd40b6a7d56 SHA-1: 64f884b8f76771bf89eb3276eabb1169e1b9d8cd SHA-256: 4b1991f729ec8ea45d4b9ac774406efb2664b9196f23b1052379e59e960983c1
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=que+es+el+aprendizaje+visual+pdf'. This indicates the document's primary purpose is to trick the user into visiting a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute the malicious redirector. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

Heuristics 3

  • 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.
  • 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/pify?keyword=que+es+el+aprendizaje+visual+pdf
    • http://nobezan.royalqueendom.com/uploads/1/3/1/4/131453512/401ae3b2dda217.pdf
    • http://files.michelleporcelli.com/uploads/1/3/0/8/130814397/jugugul.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/xiwigunatajavemexonituzot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/43835803611.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/bikupinuso.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/nijozik.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/71915073994.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/driver_microsoft_bluetooth_enumerator.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/xebavemikenovisajige.pdf
    • https://cdn.shopify.com/s/files/1/0429/6133/8531/files/62215116337.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_off0000acde.bin
adfe1c6e72d7fc65bce1f464de3bf6fadbfa537e2f06ddc1d124be956087275c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACDE 5284 bytes
font_01_sfnt_off0000befa.bin
cee83bf0acabc123a59d6c525c66ac0c4eab80cd11cc1ff562644dd885f226f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFA 10640 bytes

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