Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6e9d814c8f8a6d…

MALICIOUS

PDF

76.7 KB Created: 2020-07-30 12:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918bab239e5720143e5c3c27924b57e4 SHA-1: 53c1cc5c032bf45125d4dafafa9ba196a7aedf26 SHA-256: fb6e9d814c8f8a6dcd7984de3b54f672a332548b2b5ab5459d2e07aee7b52036
148 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that, when clicked, leads to a link farm of other PDF files, likely for SEO poisoning or to obscure the final destination. The document also contains a visual lure for a download button and mentions scanning a QR code, suggesting a multi-stage lure to trick the user into downloading or accessing malicious content. The primary malicious IOC is the redirector URL.

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.
  • 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
  • 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.cc/pify?keyword=pharmacotherapy+casebook+answers+9th+edition+pdf
    • http://files.bradfordscholarship.org/uploads/1/3/0/7/130739814/ef9fb46d483bd5.pdf
    • http://files.nbestimating.com/uploads/1/3/0/7/130776001/degif-vusiterude-muxoduk-zezej.pdf
    • http://files.datumfoundation.org.uk/uploads/1/3/1/4/131411539/siluwekabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/11524337866.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/jurife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/4887122519.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/tisapopitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/povumad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/16960391527.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/kejidejugiwudojom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/2618186734.pdf
    • https://cdn.shopify.com/s/files/1/0435/1652/6752/files/zifego.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_off0000e7d0.bin
87c1d12b758452e1d2859e1d375a7578ca2e133819efef923ae0ca12b8bd4762		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 5708 bytes
font_01_sfnt_off0000fb15.bin
d05eb454f63fdf3e2a8548619da0762432c429e7c905378bf95191c4f811dda0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 13004 bytes

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